Sgt. 1st Class Luis Rivera, from Coamo, Puerto Rico,

Sgt. 1st Class Luis Rivera, from Coamo, Puerto Rico, a brigade operations and plans noncommissioned officer assigned to Headquarters and Headquarters Battery, 210th Fires Brigade, 2nd Infantry Division, checks the land navigation equipment of Pfc. Douglas Spry, from Joplin, Mo., a security escort assigned to the United Nations Command Security Battalion-Joint Security Area, 210th Fires Brigade, 2nd Infantry Division, before he begins day land navigation during the 210th Fires Brigade Best Warrior Competition on Camp Casey, South Korea, March 19, 2013. The event is an individual competition that demonstrates the 210th Fires Brigade readiness to fight tonight in order to deter aggression toward the Republic of Korea. (U. S. Army photo by Pfc. Kim Han-byeol, 210th Fires Brigade public affairs specialist/Released)