Alpine Pass Assault Marines move to conduct a simulated assault outside the Alpine Pass at the National Training Center at Fort Irwin, Calif., June 30, 2017. The Marines are assigned to Echo Company, 2nd Battalion, 4th Infantry Regiment. Army photo by Pfc. Austin Anyzeski SHARE: Download: Full Size (1.51 MB) Credit: Austin Anyzeski VIRIN: 170630-A-UJ561-030Y.JPG Photo Gallery