U.S. Marine Corps infantry squad leaders assigned to School of Infantry West, Detachment Hawaii, defend their position during the Advanced Infantry Course (AIC) aboard Kahuku Training Area, Sept. 20, 2016.
AIC is intermediate training designed to enhance and test the Marine's skills and leadership abilities as squad leaders in a rifle platoon. (U.S. Marine Corps Photo by Cpl. Aaron S. Patterson) Original public domain image from Flickr