Soldiers assemble a pair of interior bridge bays on the Arkansas River during Operation River Assault 2015 at Fort Chaffee, Ark., Aug. 4, 2015. Soldiers assemble a pair of interior bridge bays on the Arkansas River during Operation River Assault 2015 at Fort Chaffee, Ark., Aug. 4, 2015. SHARE: Download: Full Size (1.892383 MB) Tags: Photo Essays Credit: VIRIN: 499183-U-TEA22-259.jpg Photo Gallery