The US used the F-117 in combat over Serbia and, before that, during Operation Desert Storm. In 1999, Serbia shocked the world by shooting down a state-of-the-art stealthy American F-117 Nighthawk bomber as it carried out a bombing mission over Serbia (then still officially Yugoslavia but by then a rump state) using an outdated SAM system. This is how Serbia managed to shoot down the pride of the US Air Force.