WASHINGTON, DC—Recovering at Walter Reed Army Medical Center in Washington after taking multiple rifle rounds in his thigh and hip in an encounter with friendly forces outside the Iraqi city of Baquba last month, Marine Lance Cpl. Carver Jefferson says being shot by one's own forces only increases the pain. "When you catch a bullet, it hurts, naturally," said Jefferson, who is not allowed to reveal the details of what happened at the checkpoint he and 13 other Marines were guarding when they came under fire from an Army reconnaissance squad.  "But when you're shot by a fellow American, it hurts on the inside. More, I mean." Jefferson said that Pat Tillman, the former NFL player turned Army Ranger killed in a friendly-fire incident in 2004, surely suffered a shot to the heart when his own men shot him repeatedly in the head and abdomen.