From the History Commons Groups blog:

A large number of new entries have been added to the Complete 9/11 Timeline at History Commons, including many that reveal details about the events of September 11, 2001, and others that describe important events from the years preceding the 9/11 attacks.

Security Chief Predicted Attacks on the WTC

Several entries relate to the actions of Rick Rescorla, Morgan Stanley Dean Witter's vice president for security at the World Trade Center, and his friend and former Army colleague Dan Hill. In 1990, the two men wrote a report that predicted a terrorist attack at the WTC closely resembling the 1993 bombing, involving a truck bomb in the underground garage. In the aftermath of the 1993 WTC bombing, Hill and Rescorla conducted an analysis of security and predicted that terrorists would attack the towers again, probably by crashing a plane into them. Rescorla consulted his friend Fred McBee, who, by using a flight simulator program on his computer, concluded that such a scenario was "very viable."

In 1998, Hill came up with a plan to go to Afghanistan and kill Osama bin Laden. In spring 2000, he met with an FBI agent to discuss the plan and request US military assistance. But a year later, after she consulted FBI headquarters, the agent informed Hill that his request had been rejected and so he had to drop his plan.

Some entries relate to training exercises held at the World Trade Center. In one drill, conducted in 1982, the Port Authority and other agencies actually practiced for the scenario of a plane crashing into the Twin Towers. In March 1993, during public hearings that examined the security aspects of the recent WTC bombing, Guy Tozzoli, a former director of the World Trade Department, said the Port Authority should again train for the possibility of a plane hitting the WTC, but his recommendation was ignored. However, in June 1999, September 2000, and summer 2001, the Port Authority and the New York City Fire Department held realistic exercises that simulated a major fire on an upper floor of the WTC.

Vice President Cheney Evacuated to the White House Bunker

Many new entries describe events from the day of 9/11, especially looking at the actions of Vice President Dick Cheney, his wife, Lynne Cheney, and their Secret Service agents.

James Scott, Dick Cheney's lead Secret Service agent, learned of the first crash at the World Trade Center from television and then alerted the other members of Cheney's Secret Service detail to the news. After the second crash, he discussed what to do in response with a supervisor. He headed to the West Wing of the White House and joined Cheney's other agents there at 9:30 a.m.

At around 9:35 a.m., the agents learned that a suspicious aircraft was approaching Washington, DC, and consequently evacuated Cheney from his office at around 9:36 a.m., according to some accounts. (However, other accounts have suggested that Cheney was evacuated at around 9:03 a.m.) About a minute after leaving his office, Cheney reached an underground tunnel leading to the Presidential Emergency Operations Center (PEOC), a bunker below the White House.

Lynne Cheney Evacuated from Hair Salon to the White House

Lynne Cheney, meanwhile, was at a hair salon near the White House when the planes hit the WTC and was told what had happened by one of her Secret Service agents. But she was only evacuated from the hair salon shortly after 9:33 a.m., when the Secret Service learned of the unidentified plane approaching Washington. Furthermore, when she reached the White House, guards initially tried to prevent her car from entering the grounds. And after Cheney entered the White House, the Secret Service agent who accompanied her was initially confused about where he should take her.

Lynne Cheney finally joined her husband in the tunnel leading to the PEOC at around 9:55 a.m., and the couple went into the PEOC at around 9:58 a.m.

Liz Cheney, the eldest daughter of Dick and Lynne Cheney, phoned her father after the second crash at the WTC to tell him what was happening. Around late morning to early afternoon, Secret Service agents took her and her children to a secure government facility in rural Virginia, where she was soon joined by her husband. Later in the afternoon, the Secret Service moved Cheney, her husband, and their children to Camp David, the presidential retreat in Maryland.

The Secret Service's Response to the Attacks

Some timeline entries describe other aspects of the Secret Service's response to the 9/11 attacks. For example, following the crashes at the World Trade Center, a Secret Service agent contacted a "structural collapse team" at an Army base just outside Washington, to let it know that the Secret Service might need its assistance. And Brian Stafford, the director of the Secret Service, activated the Director's Crisis Center (DCC) at Secret Service headquarters to manage the Secret Service's response to the attacks. Another agent, Danny Spriggs, joined Stafford in the DCC at 9:35 a.m., but found his agency's ability to respond was hindered by the poor quality of the information they received in the center.

Furthermore, Secret Service executives only implemented an "emergency call-up" of all agency personnel after the Pentagon attack. And members of the Secret Service emergency response team who were on the ground when President Bush's helicopter arrived at the White House early in the evening were ordered to pull back out of camera range, which meant they were too far from the president to respond effectively if something bad had happened.

After he learned of the events in New York, Carl Truscott, the Secret Service special agent in charge of the presidential protective division, called three colleagues to his office for a meeting. During the meeting, the agents discussed "security enhancements" at the White House, and the Secret Service subsequently began implementing those security enhancements.

Sometime before 9:45 a.m., Truscott was alerted to the suspicious aircraft approaching Washington and he consequently ordered the evacuation of the White House. The Eisenhower Executive Office Building, next to the White House, was, like the White House, evacuated at 9:45 a.m.

Following his meeting, Truscott headed to the PEOC, but he stopped on the way to take National Security Adviser Condoleezza Rice with him. Before going, Rice briefly spoke on the phone with President Bush. She entered the PEOC shortly before 10:00 a.m.

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