REAPER RUCK Army Staff. Sgt. Steven Caldwell, front, accompanied by his two canine friends Rugger and Reese, leads the pack for the 19 officer candidates in a 10-mile march also known as Reaper Ruck, on Camp Atterbury Joint Maneuver Training Center, Ind., Nov. 6, 2010. Caldwell is an instructor is assigned to the Officer Candidate School. SHARE IMAGE: Download Image: Full Size (0.07 MB) Photo By: VIRIN: 031931-Z-DDB99-049.jpg Photo Gallery