Two of them were American-trained Saudi fighter pilots. One graduated from America's foremost flight university. One drank Stoli and orange juice and one advertised for a Mexican bride. The 19 men identified by the FBI as suspects in the World Trade Center and Pentagon hijack attacks ... studied flying, lived in nondescript suburban apartments and seldom called attention to themselves. Most lived for a time in Florida. Others were scattered in Massachusetts, New Jersey, Arizona and Southern California. Then, in the last several weeks, they began disappearing from their neighborhoods. They reappeared Friday on a list of suspects in the deadliest terrorist attack in U.S. history. The FBI said it did not know for certain where most of the men came from, exactly where they lived in the United States or how old they were. Several had names so common in the Middle East that tracking them down might never be possible. A defense official said two of the [9/11] hijackers were former Saudi fighter pilots who had studied in exchange programs at the Defense Language School at Lackland Air Force Base in Texas and the Air War College at Maxwell Air Force Base in Alabama.