Those currently convalescing at Walter Reed include Sergeant Cory Hicks, who was stationed in Kuwait when a drone attack at the start of the war killed six American soldiers and injured more than 20. CBS News reported that Hicks suffered a lacerated kidney, a severed spleen and a traumatic brain injury. I lost six of my battle buddies who were sitting pretty close to me and that's a struggle within itself, Hicks said in an April interview. The invisible wounds are hard to heal.