Minutes after the attack on the Pentagon, an E-4B National Airborne Operations Center plane takes off from Wright-Patterson Air Force Base, near Dayton, Ohio, bound for an undisclosed location. E-4Bs are highly modified Boeing 747s, fitted with sophisticated communications equipment, that act as flying military command posts. Nicknamed “Doomsday” planes during the Cold War, they serve the president and the Joint Chiefs of Staff. They can also support the Federal Emergency Management Agency (FEMA) during major disasters, like hurricanes or earthquakes. Wright-Patterson is one of the few designated bases for these special planes. The US military possesses four of them in total, one of which is constantly kept on alert. [Federation of American Scientists, 4/23/2000; Dayton Daily News, 9/12/2001] Three of the E-4Bs are airborne this morning, due to their role in a pre-scheduled military exercise called Global Guardian (see Before 9:00 a.m. September 11, 2001, (9:27 a.m.) September 11, 2001, and (9:45 a.m.) September 11, 2001). [Omaha World-Herald, 2/27/2002] The E-4B from Wright-Patterson will return to the base later in the day. [Dayton Daily News, 9/12/2001]