Staff Sgt. Pedro Carrillo and Sgt. Arnald A. de Jonge chain down a plank for vehicles drive over between boxcars during a train unloading at Roswell, N.M. on April 10, 1997. The train is carrying vehicles which will be used by the Netherlands Army in Exercise Roving Sands 97. More than 20,000 service members from all branches of the armed forces of the U.S., Canada, Germany, and the Netherlands are participating in Exercise Roving Sands 97. The exercise is designed to refine their skills in operations using an integrated air defense network of ground, missile and radar early warning systems combined with tactical fighter and bomber aircraft operating in a simulated high-threat environment. Carrillo is attached to the U.S. Army's 390th Transportation Company. Sgt. de Jonge is a member of the Netherlands Army.