February 23, 2007 A US tourist realized a robbery wasn't a joke when a masked robber put a gun to her head and a military veteran in her tour group grabbed the young assailant and killed him with his bare hands. "I thought it was a skit. But then he pointed the gun at my head and grabbed me by the throat and I thought I was going to die," Clova Adams, 54, told The Associated Press by telephone from the Carnival Liberty cruise ship on Friday, two days after the thwarted robbery. The assault took place during a ship...