Stack Formation Paratroopers move along a wall in a stack formation before preparing to clear a building during Exercise Sky Soldier 16 at Chinchilla training area in Albacete, Spain, Feb. 29, 2016. Army photo by Staff Sgt. Opal Vaughn SHARE: Download: Full Size (0.51 MB) Tags: hmmwv, usareur, CTA, 173rd, spain, us military, Alliance, Gun, high mobility multipurpose wheeled vehicle, 1-503rd, Albacete, NATO allies, Sky Soldier 16, Spanish Armed Forces Airborne Brigade (BRIPAC), M41 TOW, BRIPAC, Spanish armed forces airborne brigade, 173rd ibct(a), 173rd infantry brigade combat team (airborne), spanish military, chinchilla training area, 1st battalion 503rd infantry regiment, acrf, nato partners, nato alliance, exercise sky soldier, saber junction, sbj16, airborne proficiency, M41 TOW Improved Target Acquisition System, TOW system, M41 TOW ITAS, ITAS, slingload training, M249L, m4 carbine rifle, Chinchilla, Exercise Sky Soldier 16, 173rd Airborne Brigade , Airborne operations, Saber Junction 16, Fire fight, Spanish Army, US ARMY EUROPE, SKY Soldiers, interoperability, Army, Air Assault, NATO, jumpmaster, paratroopers, US Army, partnership, airborne, MILITARY Credit: Staff Sgt. Opal Vaughn VIRIN: 160229-A-MM054-068A.JPG Photo Gallery