20 years ago, NATO goes to war for the first time, and so does America's B-2 stealth bomber. It's March 24, 1999. Two B-2 bombers snap off their running lights high over the Mediterranean Sea and climb to combat alititude to begin their target run over Yugoslavia. Cruise missiles expode below them. Enemy MiG-29s are airborne. It is night one of NATO's Operation Allied Force. Read more about the 78-day air campaign that followed.