When a Mexican SWAT team stopped a stolen Cadillac van in the border city of Piedras Negras, it was not a surprise when they were greeted by a tirade of bullets as the criminals blasted and ran. But after they kicked open the trunk, the officers realized they could have been victims of more catastrophic firepower. The gunmen had been in possession of an arsenal of weapons that included three Soviet-made antitank rockets complete with an RPG-7 shoulder-fired launcher. If the criminals had got a rocket off, they could easily have blown the SWAT vehicle to pieces. RPG-7s can also take out helicopters and were used in the Black Hawk Down episode in Somalia in 1993.