Lt. Cmdr. Bill Schalck examines an Afghan man's knee.
U.S. Navy Lt. Cmdr. Bill Schalck, with 3rd Battalion, 4th Marine Regiment, examines an Afghan man's knee during a combined medical engagement in Now Zad, Afghanistan, on Dec. 18, 2009. Schalck and the other medics provide medical care for anyone who comes to the engagement.