AP:
A video posted on YouTube showed Olsen being carried by other protesters through the tear gas, his face bloodied. People shout at him: "What's your name? What's your name?" Olsen just stares back.
Shepherd said it's a cruel irony that Olsen is fighting an injury in the country that he fought to protect.
People at OPSWAT, the San Francisco security software company where Olsen works, were devastated after learning of his injuries. They described him as a humble, quiet man.
Olsen was awarded seven medals while serving in the U.S. Marine Corps, which he left as a lance corporal in November 2009 after serving for four years. One of them was the Navy-Marine Corps Achievement Medal.
