Sean Smith of the UK Guardian has just spent five weeks in Afghanistan, first with an Air Force Pararescue team, and then with the Marines. This extraordinary footage was shot during that time, and the units with which Smith embedded were involved in two events you're likely familiar with. The USAF PJs subsequently lost four men in a helo crash, and the Marines discuss the death of Cpl Larry Harris.
Warning: Video contains strong language and distressing MEDEVAC scenes.
Smith's diary of the embed can be found here.