Douglas Cochrane, Vice President Dick Cheney’s military aide, joins Cheney in an underground tunnel that leads to the Presidential Emergency Operations Center (PEOC) below the White House and is told that an aircraft hit the Pentagon. After Flight 175 crashed into the World Trade Center at 9:03 a.m., Cochrane went from the White House to his office in the Eisenhower Executive Office Building, next to the White House, to fetch a special briefcase that holds the codes necessary to initiate a nuclear attack (see 9:03 a.m. September 11, 2001). When he arrived back at the White House, he saw Cheney being evacuated from his office by his Secret Service agents (see (9:36 a.m.) September 11, 2001). Cochrane tried to follow Cheney as he was being escorted to the underground tunnel that leads to the PEOC, but the door to the tunnel was shut behind the vice president. Cochrane said, “Open the door,” but agents there said they could not do this. He therefore had to take another route to get to the tunnel. Cochrane now joins Cheney. He finds that Lynne Cheney, the vice president’s wife, has joined Cheney in the tunnel (see (9:55 a.m.) September 11, 2001) and the group around the vice president is getting ready to head to the PEOC. While Cochrane is in the tunnel, a Secret Service agent tells him, “They just got the Pentagon.” Cochrane will later comment that before receiving this notification, he had been unaware that an aircraft was approaching Washington, DC. He will go with Cheney and the group accompanying the vice president into the PEOC (see (9:58 a.m.) September 11, 2001), and stay in the PEOC for the rest of the day. [9/11 Commission, 4/16/2004]