STAFF Sergeant Pedro Carrillo (left) of the 390th Transportation Company and Sergeant Arnald A. de Jonge of the Dutch Army chain down a plank so vehicles can pass from one boxcar to the next smoothly and without harm. The military vehicles are being transported from Roswell, New Mexico, to their final destination at Fort Bliss, Texas, in support of ROVING SANDS '97. ROVING SANDS is a multinational effort and is the largest military exercise on United States soil that allows training in a joint environment to hone command and control procedures and integrate new systems in Theater and Air Missile Defense