Army Spc. Sylvester Rivera adjusts the sight of his 81mm mortar during annual training at Camp Santiago Joint Maneuver Training Center in Salinas, Puerto Rico, July 11, 2012. Rivera is assigned to the Puerto Rico National Guard 296th Infantry Battalion, 101st Troop Command. Army Spc. Sylvester Rivera adjusts the sight of his 81mm mortar during annual training at Camp Santiago Joint Maneuver Training Center in Salinas, Puerto Rico, July 11, 2012. Rivera is assigned to the Puerto Rico National Guard 296th Infantry Battalion, 101st Troop Command. SHARE: Download: Full Size (1.28 MB) Tags: photo essays Credit: VIRIN: 799272-G-KOW01-116.jpg Photo Gallery