U.S. Army Maj. Gen. David W. Puster and Canadian Army Brig. Gen. Kelly Woiden watch as members of the 324th Military Police Battalion use a sand table to illustrate troop movement, security measures and enemy movement July 28, 2014, at Fort Hunter Liggett, Calif., during Warrior Exercise (WAREX) 91 14-03. Sand tables are often used as aids during debriefings to help communicate physical positioning more effectively. (U.S. Army photo by Pvt. Travis J. Terreo, 205th Press Camp Headquarters)