Murky Matters A Marine Corps officer candidate breaks the surface of the Quigley, a murky water obstacle used for training, at the Officer Candidates School on Marine Corps Base Quantico, Va., March 15, 2016. The candidate is assigned to Delta Company, Officer Candidates Class 221. Marine Corps photo by Cpl. Patrick H. Owens SHARE: Download: Full Size (1.28 MB) Credit: Cpl. Patrick Owens VIRIN: 160324-D-HV319-001C.JPG Photo Gallery