U.S. military sources have given the FBI information that suggests five of the alleged hijackers of the planes that were used in [the 9/11] terror attacks received training at secure U.S. military installations in the 1990s. Three of the alleged hijackers listed their address on drivers licenses and car registrations as the Naval Air Station in Pensacola, Fla. -- known as the Cradle of U.S. Navy Aviation," according to a high-ranking U.S. Navy source. Another of the alleged hijackers may have been trained in strategy and tactics at the Air War College in Montgomery, Ala., said another high-ranking Pentagon official. The fifth man may have received language instruction at Lackland Air Force Base in San Antonio, Tex. Both were former Saudi Air Force pilots who had come to the United States, according to the Pentagon source. The five men were on a list of 19 people identified as hijackers by the FBI on [September 14]. The three foreign nationals training in Pensacola appear to be Saeed Alghamdi and Ahmad Alnami, who were among the four men who allegedly commandeered United Airlines Flight 93. That flight [ended in] rural Pennsylvania. The third man who may have trained in Pensacola, Ahmed Alghamdi, allegedly helped highjack United Airlines Flight 75, which hit the south tower of the World Trade Center. Military records show that the three used as their address 10 Radford Boulevard, a base roadway on which residences for foreign-military flight trainees are located.