Sgt. 1st Class Ivan Alvira, a military policeman from Headquarters, Headquarters Company, 1st Brigade Combat Team, 1st Cavalry Division, conducts a systems check on a crowd-control loudspeaker as 2nd Lt. James Bain, a military police officer with the 89th Military Police Brigade, explains the controls to a Bulgarian military policeman. (U.S. Army photo by Sgt. Alexander Skripnichuk, 7th Mobile Public Affairs Detachment)