gyro compass, principles of the gyroscope (Geen titel) Bomb incendiary 20 mm T171E2 automatic gun, Disassembly Ground aids to air navigation, AN/URN-3 Oxigen in flying Resisting enemy interogation, Part 2 Basic map reading Part 1, Conventional signs Basic map reading Part 2, Elevation, distance and grid House to house fighting Communist propaganda "Yankee go Home" USAF product improvement program (PIP) Meteorology Ice formation