Ann Mock, right, and her daughter Teresa Kirby react after Mock was presented with the flag that covered the coffin of her son Sgt. WillSun Mock during the graveside burial ceremony Thursday in Harper, Kan. WillSun "Will" Marcus Wayne Mock was a Sgt. in the U.S. Army and was killed in by an improvised explosive device Oct. 22 in Baghdad, Iraq. Mock was serving his second tour in Iraq.