Thanks to the USO, famous people who performed for the troops have participated in every war since World War II. The organization's "camp shows" raised morale in combat zones by bringing in famous singers, dancers, bands, comics and all manner of celebrities entertaining the troops. These shows put celebrities in danger, and some have had to wear bullet-proof vests. The risks could be so great that several performers were killed in crashes, and singer Al Jolson lost a lung to malaria contracted in World War II.
Famous people who performed for American troops have included everyone from old-time entertainers like Mickey Rooney to sex symbols like Marilyn Monroe to comics and metal bands. But the most famous USO supporter was Bob Hope, who spent nearly every Christmas for almost 50 years performing for American forces either in the US or overseas. His first performances were shortly after the USO was founded in 1941, and his final show was during Operation Desert Storm in 1991.Here are some of the coolest photos of celebrities performing for and hanging out with soldiers in war zones.