What started as a way for Soviet ground troops to take out German tanks in World War II has since turned into a global weapons phenomenon: The rocket-propelled grenade.
The RPG is a simple, cheap, and efficient system that can completely destroy a soft-skinned vehicle and can cause grievous harm to some up-armored ones.
Troops who encounter an RPG round in combat are lucky to survive to tell the tale.
"When I was in Iraq, the RPG was a deadly weapon," Staff Sgt. Matthew Bertles, a U.S. Army M240 gunner, told the show Weaponology. "An RPG struck my 240, blew me back, destroyed our vehicle, and injured me."