Cpl. Anthony Lubbers, designated marksmanship instructor, Combat Center Marksmanship Training Unit, prepares to breach a door during the Western Regional Combat Match at Marine Corps Air Combat Center, April 8, 2016. - Cpl. Anthony Lubbers, designated marksmanship instructor, Combat Center Marksmanship Training Unit, prepares to breach a door during the Western Regional Combat Match at Marine Corps Air Combat Center, April 8, 2016.