A U.S. CH-47 Chinook helicopter descends as U.S. and Afghan soldiers prepare to board to conduct a partnered air assault mission in the town of Mirugal Kalay near Camp Hero, Afghanistan, Oct. 23, 2014. The mission was the first time the 4th Infantry Division's Company B, 1st Battalion, 12th Infantry Regiment, 4th Infantry Brigade Combat Team was able to partner with Afghan soldiers on an air assault.