Army Spc Ricardo Colin, drill sergeant candidate with Alpha Company, 3rd Battalion, 318th Regiment, marks coordinate points during the land navigation portion of the Best Warrior competition at Fort Eustis, Va., March 25, 2011. Soldiers must navigate through combat environments to test their abilities and compete for the title of Best Warrior in their division. (U.S. Air Force photo by Airman 1st Class Teresa Zimmerman/Released)