Brain injuries in Iraq draw attention to invisible war wounds

Unlike physical wounds, such as burns or the loss of limbs, traumatic brain injuries aren't obvious and can take time to diagnose. The full impact — physically and psychologically — may not be evident for some time, as studies have shown links between TBI and mental health problems.

2 US troops killed by roadside bomb in Afghanistan

Two U.S. service members were killed and two others injured when their vehicle was hit by a roadside bomb in southern Afghanistan, the U.S. military said in a statement Saturday.