SLBMs W40 W91 WEQp177 Skywarrior 14D warhead W81 W84 weapons MA2 Brogel ICBMs megaton tendard Stratofortress W70 B83 ASMP TARPS W44 100C TLAM Silverplate AFTAC W80 W73 bombloads 78GP02A deterrence Gundremmingen Fagot Thunderchief missiles 15E snRNAs 104C 105D