Air Force pursuing antimatter weapons / Program was touted publicly, then came official gag order

Air Force pursuing antimatter weapons / Program was touted publicly, then came official gag order: "During the Cold War, the Air Force funded numerous scientific studies of the basic physics of antimatter. With the knowledge gained, some Air Force insiders are beginning to think seriously about potential military uses -- for example, antimatter bombs small enough to hold in one's hand, and antimatter engines for 24/7 surveillance aircraft."