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The Denver Post remembers Sept. 11, 2001: Darkest hour: Thousands die as hijacked jets strike World Trade Center, Pentagon

President Bush promises retribution for terrorists “and those who harbor them”

  • A plane approaches New York's World Trade Center moments before...

    William Kratzke, The Associated Press

    A plane approaches New York's World Trade Center moments before it struck the tower at left, as seen from downtown Brooklyn, Tuesday, Sept. 11, 2001. In an unprecedented show of terrorist horror, the 110 story towers collapsed in a shower of rubble and dust after 2 hijacked airliners carrying scores of passengers slammed into them.

  • In this Sept. 11, 2001 file photo, a jet airliner...

    Carmen Taylor, The Associated Press

    In this Sept. 11, 2001 file photo, a jet airliner is lined up on one of the World Trade Center towers in New York.

  • Smoke billows from one of the ...

    Chao Soi Cheong, The Associated Press

    Smoke billows from one of the towers of the World Trade Center and flames and debris explode from the second tower, Tuesday, Sept. 11, 2001. Chao Soi Cheong, The Associated Press

  • A fireball erupts from one of the World Trade Center...

    Todd Hollis, The Associated Press

    A fireball erupts from one of the World Trade Center towers as it is struck by the second of two airplanes in New York, Tuesday, Sept. 11, 2001.

  • Hijacked United Airlines Flight 175 from Boston crashes into the...

    Spencer Platt, Getty Images

    Hijacked United Airlines Flight 175 from Boston crashes into the south tower of the World Trade Center and explodes at 9:03 a.m. on September 11, 2001 in New York City.

  • Debris falls from one of the ...

    Richard Drew, The Associated Press

    Debris falls from one of the burning twin towers of the World Trade Center after a hijacked plane crashed into the tower on Sept. 11, 2001 in New York City. Richard Drew, The Associated Press

  • A ball of fire explodes from one of the towers...

    The Associated Press, ABC via APTN

    A ball of fire explodes from one of the towers at the World Trade Center in New York after a plane crashed into it in this image made from television Tuesday Sept. 11, 2001. The aircraft was the second to fly into the tower Tuesday morning.

  • As seen from the New Jersey Turnpike near Kearny, N.J.,...

    Gene Boyars, The Associated press

    As seen from the New Jersey Turnpike near Kearny, N.J., smoke billows from the twin towers of the World Trade Center in New York after airplanes crashed into both towers Tuesday, Sept.11, 2001.

  • Fire and smoke billows from the north tower of New...

    David Karp, The Associated Press

    Fire and smoke billows from the north tower of New York's World Trade Center Tuesday Sept. 11, 2001 after terrorists crashed two hijacked airliners into the World Trade Center and brought down the twin 110-story towers.

  • Debris fall from one of the burning twin towers of...

    Richard Drew, The Associated Press

    Debris fall from one of the burning twin towers of the World Trade Center after a hijacked plane crashed into the tower on September 11, 2001 in New York City.

  • Smoke billows from the twin towers of the World Trade...

    Gulnara Samoilova, The Associated Press

    Smoke billows from the twin towers of the World Trade Center in New York Tuesday Sept. 11, 2001.

  • People hang from the windows of the North Tower of...

    Jose Jimenez, Primera Hora, Getty Images

    People hang from the windows of the North Tower of the World Trade Center after a hijacked airliner hit the building September 11, 2001 in New York City.

  • This Sept. 11, 2001 file photo shows the twin towers...

    Marty Lederhandler, The Associated Press

    This Sept. 11, 2001 file photo shows the twin towers of the World Trade Center burning behind the Empire State Building in New York.

  • The south tower of New York's ...

    Gulnara Samoilova, Associated Press file

    The south tower of New York's World Trade Center, left, begins to collapse after a terrorist attack on the buildings on Sept. 11, 2001. Federal investigators believe the second World Trade Center tower fell much more quickly than the first because it faced a more concentrated, intense fire inside, officials said Tuesday. Oct. 19, 2004. Investigators have singled out this Associated Press photograph that they said may provide evidence to support their theory which shows a "kink" in the building's corner at the 106th floor. Gulnara Samoilova, The Associated Press

  • People run from the collapse of ...

    Suzanne Plunkett, The Associated Press

    People run from the collapse of World Trade Center Tower Tuesday, Sept. 11, 2001 in New York. Suzanne Plunkett, The Associated Press

  • A person falls from the north tower of New York's...

    Richard Drew, The Associated Press

    A person falls from the north tower of New York's World Trade Center in this Sept. 11, 2001 file photo, after terrorists crashed two hijacked airliners into the World Trade Center and brought down the twin 110-story towers.

  • President Bush's Chief of Staff Andy ...

    Doug Mills, The Associated Press

    President Bush's Chief of Staff Andy Card whispers into the ear of the President to give him word of the plane crashes into the World Trade Center, during a visit to the Emma E. Booker Elementary School in Sarasota, Fla., Tuesday, Sept. 11, 2001.

  • The south tower of New York's ...

    Richard Drew, Associated Press file

    The south tower of New York's World Trade Center collapses Tuesday Sept. 11, 2001.

  • A man cries on Sept. 11, ...

    Shawn Baldwin, The Associated Press

    A man cries on Sept. 11, 2001 after witnessing the collapse of the north tower of the World Trade Center in New York City.

  • People run from the collapse of ...

    People run from the collapse of World Trade Center Tower Sept. 11, 2001 in New York.

  • A firefighter breaks down after the ...

    Mario Tama, Getty Images

    A firefighter breaks down after the World Trade Center buildings collapsed Sept. 11, 2001 after two hijacked airplanes slammed into the twin towers in a terrorist attack.

  • Survivors of the World Trade Center ...

    Survivors of the World Trade Center terrorist attacks make their way through smoke, dust and debris on Fulton St., about a block from the collapsed towers Sept. 11, 2001 in New York.

  • Emergency workers help a women after she was injured in...

    Gulnara Samoilova, The Associated Press

    Emergency workers help a women after she was injured in the terrorist attack on the World Trade Center in New York, Tuesday, Sept. 11, 2001.

  • People walk in the street in the area where the...

    Mario Tama, Getty Images

    People walk in the street in the area where the World Trade Center buildings collapsed September 11, 2001 after two airplanes slammed into the twin towers in a suspected terrorist attack.

  • Julie McDermott, center, walks with other victims as they make...

    Gulnara Samoilova, The Associated Press

    Julie McDermott, center, walks with other victims as they make their way amid debris near the World Trade Center in New York Tuesday Sept. 11, 2001.

  • This 11 Sept. 2001 file photo ...

    Stan Honda, AFP

    This 11 Sept. 2001 file photo shows Marcy Borders covered in dust as she takes refuge in an office building after one of the World Trade Center towers collapsed in New York. Borders was caught outside on the street as the cloud of smoke and dust enveloped the area.

  • An ambulance, covered with debris, is ...

    Doug Kanter, AFP/Getty Images

    An ambulance, covered with debris, is on fire after the collapse of the first World Trade Center Tower 11 September, 2001 in New York.

  • A fireman screams in pain during ...

    Robert Mecea, The Associated Press via Newsday

    A fireman screams in pain during his rescue shortly after both towers of New York's World Trade Center collapsed following a terrorist attack, Sept. 11, 2001.

  • Destroyed mullions, the vertical struts which ...

    Mark Lennihan, The Associated Press

    Destroyed mullions, the vertical struts which once faced the soaring outer walls of the World Trade Center towers, are the only thing left standing behind a lone fireman, after a terrorist attack on the twin towers of lower Manhattan Tuesday, Sept. 11, 2001.

  • A man with a fire extinguisher ...

    Doug Kanter, AFP

    A man with a fire extinguisher walks through rubble after the collapse of the first World Trade Center Tower 11 September, 2001, in New York. The man was shouting as he walked looking for victims who needed assistance. Both towers collapsed after being hit by hijacked passengers planes.

  • The rubble of the World Trade ...

    Alexandre Fuchs, AFP

    The rubble of the World Trade Center smolders following a terrorist attack 11 Sept. 2001 in New York.

  • Edward Fine covering his mouth as he walks through the...

    Stan Honda, AFP

    Edward Fine covering his mouth as he walks through the debris after the collapse of one of the World Trade Center Towers in New York. Fine was on the 78th floor of 1 World Trade Center when it was hit by a hijacked plane 11 September, 2001.

  • People flee lower Manhattan across the ...

    Daniel Shanken, The Associated Press

    People flee lower Manhattan across the Brooklyn Bridge in New York, Tuesday, Sept. 11, 2001, following a terrorist attack on the World Trade Center.

  • Brooklyn firefighters George Johnson, left, of ladder 157, Dan McWilliams,...

    Thomas E. Franklin, The Associated Press via The Record

    Brooklyn firefighters George Johnson, left, of ladder 157, Dan McWilliams, center, of ladder 157, and Billy Eisengrein, right, of Rescue 2, raise a flag at the World Trade Center in New York on Sept. 11, 2001, as work at the site continues after hijackers crashed two airliners into the center.

  • Deputy U.S. marshal Dominic Guadagnoli helps ...

    Gulnara Samoilova, The Associated Press

    Deputy U.S. marshal Dominic Guadagnoli helps a women after she was injured in the terrorist attack on the World Trade Center in New York, Tuesday, Sept. 11, 2001.

  • Firefighters walk through smoldering debris at ...

    Graham Morrison, The Associated Press

    Firefighters walk through smoldering debris at the site of the World Trade Center in New York Tuesday, Sept. 11, 2001.

  • People flee the scene near New ...

    Diane Bondareff, The Associated Press

    People flee the scene near New York's World Trade Center after terrorists crashed two planes into the towers Tuesday, Sept. 11, 2001.

  • Pedestrians flee the area of the ...

    Amy Sancetta, The Associated Press

    Pedestrians flee the area of the World Trade Center in lower Manhattan following a terrorist attack on the New York landmark Tuesday, Sept. 11, 2001.

  • Flames and smoke pour from a ...

    Will Morris, The Associated Press

    Flames and smoke pour from a building at the Pentagon Tuesday, Sept. 11, 2001, after a direct, devastating hit from an aircraft.

  • Smoke comes out from the Southwest ...

    Alex Wong, Getty Images

    Smoke comes out from the Southwest E-ring of the Pentagon building Sept. 11, 2001 in Arlington, Va., after a plane crashed into the building and set off a huge explosion. Alex Wong, Getty Images

  • Construction workers continue to clear the ...

    Wally Santana, the Associated Press

    Construction workers continue to clear the rubble at the site of the World Trade Center, destroyed in the Sept. 11, 2001 terrorist attacks, on September 15, 2001.

  • Work continues at the Pentagon Monday, ...

    Ron Edmonds, The Associated Press

    Work continues at the Pentagon Monday, Sept. 17, 2001, six days after a hijacker flew American Airlines Flt. 77 into the building during the Sept. 11 attacks.

  • Officials examine the crater 11 Sept. ...

    David Maxwell, AFP

    Officials examine the crater 11 Sept. 2001 at the crash site of United Airlines Flight 93 in Shanksville, Pennsylvania. The plane from Newark, New Jersey, and bound for San Francisco, California, was hijacked and crashed in the field killing all 45 people on board.

  • Cars are buried under debris in ...

    Shawn Baldwin, The Associated Press

    Cars are buried under debris in the aftermath of the Sept. 11 attacks.

  • A truck sits in the rubble ...

    Doug Kanter, AFP/Getty Images

    A truck sits in the rubble in lower Manhattan 11 September, 2001, in New York after two planes flew into the World Trade Center twin towers.

  • An American flag flies over the ...

    Beth A. Keiser, The Associated Press

    An American flag flies over the rubble of the World Trade Center in New York, Sept. 13, 2001.

  • A New York City fireman calls ...

    Jim Watson, Getty Images via U.S. Navy

    A New York City fireman calls for 10 more rescue workers to make their way into the rubble of the World Trade Center Sept. 14, 2001 days after the September 11, 2001 terrorist attack.

  • The Statue of Liberty can be ...

    Dan Loh, The Associated Press

    The Statue of Liberty can be seen at first light from a view from Jersey City, N.J., as the lower Manhattan skyline is seen though a thick smoke filled the sky early Saturday, Sept. 15, 2001.

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PUBLISHED: | UPDATED:

Originally published Sept. 12, 2001 • By Mark Obmascik

In the most devastating terrorist attack in U.S. history, hijackers crashed two passenger jets Tuesday into the World Trade Center in New York City and one into the Pentagon near Washington, killing thousands and leaving the nation feeling horrified and vulnerable.

President Bush vowed retribution, saying, “We will make no distinction between the terrorists who committed these acts and those who harbor them.”

At 8:45 a.m. EDT, the first plane, with 92 aboard, slammed into the north tower of the Trade Center in Manhattan. Eighteen minutes later, another jet, with 65 on board, erupted in a fireball midway up the south tower.

Less than an hour later, a third hijacked flight crashed into the Pentagon, killing all 64 aboard. Another 45 passengers and crew were killed shortly afterward when their hijacked plane dived into a field near Shanksville, Pa.

As hundreds of New York police officers and firefighters rushed to rescue survivors, the twin 110-story towers of the World Trade Center collapsed in a massive cloud of fire and rubble, spewing dust down Manhattan streets. Reported missing were 78 police officers and more than 300 firefighters and paramedics. The city’s fire chief was killed.

Mayor Rudolph Giuliani said the death toll would not be known for at least a day but would be “more than any of us can bear.” As many as 50,000 people worked in the two towers, which have up to 100,000 visitors a day.

There were reports Tuesday night of survivors using cellphones to call for help while buried in rubble. One trapped man reached family in Pennsylvania and gave directions on how to rescue him and two police sergeants.

Six firefighters were rescued from one collapsed building, and crews searched through the night for other victims. “We’re very hopeful there are pockets of people,” the mayor said.

Flanked by protective fighter jets, Air Force One whisked the president from his speech at a Florida elementary school to military bases in Louisiana and Nebraska before returning him to the White House.

Bush ordered investigators to “hunt down the folks who committed this act.”

In the aftermath of the suicide assaults on symbols of American business and military power, the Federal Aviation Administration closed all U.S. airports for the first time ever, until at least noon today. The White House was evacuated, and hundreds of government and business offices were shut down.

In Denver, the state Capitol was closed, and hundreds lined up to donate blood at the Bonfils center at the former Lowry Air Force Base. Friends and relatives grieved after hearing reports that United Airlines pilot Jason Dahl, a Jefferson County resident, was killed in the Pennsylvania crash.

The tragedy sent more than 1,000 patients to New York City’s 170 hospitals, with at least 150 people listed in critical condition. Makeshift triage centers were set up on streets near the World Trade Center, and hundreds of other New Yorkers lined up to donate blood.

At the World Trade Center, witnesses described heartbreak after heartbreak:

Clemant Lewin, a banker who works across the street, saw a man and woman holding hands as they plunged from the 80th floor.

Kenny Johannemann, a janitor, encountered a man on fire and extinguished the flames.

Ann Ventra saw leapers engulfed in flames.

After racing down 29 flights of stairs in the south tower, Richard Cruz paused at the 63rd floor and looked out the window.

“One side of Building 1 was engulfed in flames,” said Cruz, 32. “People were yelling: “Oh my god! They’re jumping; they’re jumping out the window.’ I looked down, and I saw a lot of debris, and I saw blood spots. I saw the horror. That’s when it hit me, and I thought to myself, “I have to get out of here.'”

He did. But on the street, dust and smoke and falling shards of glass had darkened the air. Sirens blared, and workers ran for their lives.

Cruz walked past a burnt torso.

Security experts expressed dismay that terrorists had the ability to hijack four jets departing three airports within a short time. Officials suspected that the hijackers were at the controls of the planes that hit the World Trade Center and Pentagon.

“This is perhaps the most audacious terrorist attack that’s ever taken place in the world,” said Chris Yates, an aviation expert at Jane’s Transport in London. “It takes a logistics operation from the terror group involved that is second to none. Only a very small handful of terror groups is on that list. I would name at the top of the list Osama bin Laden.”

Bin Laden is the multimillionaire Saudi exile, believed to be living in Afghanistan, who has declared war on the United States and is suspected of funding terrorist activities worldwide.

The attacks were carried out with lethal precision.

At 7:59 a.m., American Airlines Flight 11 departed from Boston for Los Angeles, carrying 92 people. Two minutes later, United Airlines Flight 93, with 45 people, took off from Newark, N.J., for San Francisco.

United Flight 175, carrying 65 people, left Boston at 8:14, headed for Los Angeles. At 9 a.m., American Flight 77 departed from Washington’s Dulles International Airport for Los Angeles, with 64 people on board.

Loaded with jet fuel for cross-country travel, each plane carried 1.2 kilotons of energy, or one-tenth the killing force of the atomic weapon dropped on the Japanese city of Hiroshima in 1945.

The American Airlines flight from Boston crashed first, into the north tower of the World Trade Center. While television broadcast the tragedy live, the United flight from Boston plowed into the south tower.

Fires raged inside the towers.

Rescuers converged from across New York City to help survivors. Firefighters raced up stairwells to try to reach trapped survivors. At one point, rescuers had to decide whether to continue climbing upward through smoky stairs or try evacuating stranded victims in wheelchairs.

But at 10 a.m., the top of the south tower collapsed, and the weight made the rest of the building give way.

Police and firefighters below tried to duck the plunging rubble, but dozens were killed.

At 10:29, the north tower collapsed.

Meanwhile, the American Airlines flight from Dulles turned off its path and aimed at the Pentagon.

Across the Potomac River from Washington, the jet smashed into the huge outer ring of the building and burrowed into the parklike central courtyard.

“We have been attacked like we haven’t since Pearl Harbor,” said Adm. Robert J. Natter, the commander of the Atlantic fleet, who ordered aircraft carriers and guided missile destroyers to New York and Washington. He also dispatched amphibious ships carrying Marines and sailors who could assist with security, as well as surgical teams.

Then the FAA reported another missing flight: The San Francisco-bound United flight. At 9:58 a.m., a passenger locked in a bathroom used a cellphone to dial 911 and report a hijacking underway over Pennsylvania. This was the flight that was carrying Dahl, the Colorado-based pilot.

A caller told police that hijackers with knives had stabbed flight attendants and strong-armed their way into the cockpit. Also, Alice Hoglan told KTVU-TV in San Francisco that her son, Mark Bingham, 31, called her from aboard the flight at 9:44 a.m.

“We’ve been taken over. There are three men that say they have a bomb,” Hoglan said her son told her.

About 10 a.m., the jet crashed into a wooded area in Somerset County, Pa., 80 miles southeast of Pittsburgh.

One congressman briefed by the military said he believed the terrorists were trying to attack Camp David, the presidential retreat 85 miles away in Maryland.

“The calculated, cold-blooded, cowardly taking of precious human lives in the name of religion or nationalism is beyond blasphemy,” said Roman Catholic Bishop Kenneth Angell of Vermont. “It is pure evil.”

The New York Times, Los Angeles Times and Associated Press contributed to this report.