FORT DRUM, N.Y. - New York Army National Guard Sgt. Mark Keisecker, a premobilization trainer from the 1st Battalion, 69th Infantry, explains how to search a suspect vehicle to Soldiers of Company A, 3rd Battalion, 142nd Aviation Assault Battalion during premobilization training for elements of the 42nd Combat Aviation Brigade here September 14, 2011. The training encompasses a number of traffic control point techniques Soldiers might utliize during deployments overseas. Photo by Master Sgt. Peter Towse, 42nd Infantry Division.