Air Force 'doomsday' planes damaged in tornado

Washington (CNN)Ten US Air Force planes, including two E-4B "doomsday" aircraft, were damaged when a tornado hit near Offutt Air Force Base in Nebraska last week, the service told CNN on Friday. Nicknamed the Air Force's "doomsday" plane, the Boeing-made E-4B serves as an aerial command center in case of national emergency or destruction of ground bases. (www.cnn.com) Plus d'info...