Emergency responders in the lobby of the north WTC tower hear an unconfirmed report of a third plane heading toward New York. Consequently, Assistant Fire Chief Joseph Callan orders all firefighters to evacuate the tower. The third plane report is soon found to be incorrect. One firefighter tells a colleague over radio, “That plane is ours, I repeat, it is ours.” Rescue operations therefore continue. [New York Times, 7/7/2002; New York City Fire Department, 8/19/2002, pp. 32; Fire Engineering, 9/2002; Associated Press, 11/16/2002] The source of the incorrect report is apparently Richard Rotanz, the deputy director of the New York Office of Emergency Management (OEM), who is reportedly in the OEM command center on the 23rd floor of WTC Building 7. A Secret Service agent in WTC 7 reportedly told him there were unconfirmed reports of other planes in the air. When OEM Director Richard Sheirer called Rotanz some time after the second WTC tower was hit, Rotanz relayed this information, telling him there were “still planes unaccounted for that may [be] heading for New York.” Sheirer then told people in the North Tower lobby “that another plane was on the way.” Journalists Wayne Barrett and Dan Collins, in their book Grand Illusion, blame Sheirer for “instantly converting unspecific information into a very specific false alarm.” This false alarm quickly ends up on fire and police department dispatches. Sheirer is apparently so unnerved by it that he instructs the police department aviation unit to not let another plane hit the WTC. As he will later tell the 9/11 Commission, though, “We were grasping at straws,” since no police helicopter could “stop a commercial jet going over 400 miles per hour.” [Firehouse Magazine, 9/2/2002; 9/11 Commission, 5/18/2004 
; Barrett and Collins, 2006, pp. 32-33] Emergency medical technician Richard Zarrillo is currently in WTC 7, and is informed by an OEM rep there of the alleged third plane inbound for New York. While the rest of Building 7 was evacuated earlier on (see (9:03 a.m.) September 11, 2001), this false threat reportedly leads to the evacuation of the OEM command center as well (see (9:30 a.m.) September 11, 2001). [City of New York, 10/25/2001] (However, some accounts indicate the command center may have been evacuated earlier (see (Soon After 8:46 a.m.-9:35 a.m.) September 11, 2001 and (Shortly Before 9:03 a.m.) September 11, 2001).) Soon after hearing this false report of a third inbound plane, Mayor Rudolph Giuliani, Police Commissioner Bernard Kerik, and OEM Director Richard Sheirer will all leave the North Tower lobby and relocate to a temporary command post on Barclay Street (see (9:50 a.m.-10:10 a.m.) September 11, 2001). [Kerik, 2001, pp. 334; 9/11 Commission, 5/18/2004 ; Barrett and Collins, 2006, pp. 342]
9:45 a.m.-10:45 a.m. September 11, 2001: Witnesses First Notice Military Jets over New York, Later than Claimed in 9/11 Commission’s Account
According to the accounts of numerous witnesses on the ground near the World Trade Center, military fighter jets are first noticed flying over Manhattan either shortly before or soon after the second collapse, at 10:28 a.m. Some witnesses recall fighters arriving just before this collapse: 
Emergency medical technicians Dulce McCorvey and Michael D’Angelo hear fighters flying over Manhattan at unspecified times after the first tower’s collapse. [City of New York, 10/3/2001; City of New York, 10/24/2001] Fire Lieutenant Sean O’Malley and firefighters Pete Giudetti and Dan Potter notice jet fighters flying overhead soon before the second collapse. [City of New York, 10/12/2001; City of New York, 12/6/2001; Smith, 2002, pp. 49-50]
Other witnesses say the fighters arrive soon after this collapse: Deputy Fire Chief Robert Browne, police officer Peter Moog, and emergency medical technicians Richard Zarrillo and Jason Katz notice fighters overhead immediately after, or fairly soon after, the second tower’s collapse. [City of New York, 10/24/2001; City of New York, 10/25/2001; City of New York, 12/20/2001; Fink and Mathias, 2002, pp. 79-80] Mayor Rudolph Giuliani, Police Commissioner Bernard Kerik, and Office of Emergency Management Director Richard Sheirer are heading north together after leaving their temporary command post on Barclay Street (see (9:50 a.m.-10:10 a.m.) September 11, 2001). In some accounts, all three of them recollect hearing the first military jets overhead soon after the second tower’s collapse. [Kerik, 2001, pp. 339-340; Giuliani, 2002, pp. 14; 9/11 Commission, 5/18/2004 ] However, according to another account, Giuliani hears the first jet slightly earlier, at around 10:20 a.m. And, in his private testimony before the 9/11 Commission, Kerik claims to have heard a fighter jet coming when he was heading to the temporary command post on Barclay Street, i.e. shortly before 9:50 a.m. [Barrett and Collins, 2006, pp. 348-349]
A few witnesses claim the fighters arrive earlier on, before the first collapse at 9:59 a.m.: Emergency medical technician Frank Puma and Port Authority Freedom of Information Administrator Cathy Pavelec say they see fighter jets overhead at unspecified times before the first collapse. [City of New York, 12/12/2001; Fink and Mathias, 2002, pp. 68]
The fighter(s) are presumably the F-15s launched from Otis Air Force Base at 8:46 a.m. (see 8:46 a.m. September 11, 2001). However, the 9/11 Commission will claim that these arrived over Manhattan at 9:25 a.m. (see 9:25 a.m. September 11, 2001), which is significantly earlier than most of the witnesses on the ground recall.
