Sgt. Eric Jerabek, a heavy equipment operator with Headquarters Battery, 14th Marine Regiment, 4th Marine Division operates an excavator during Innovative Readiness Training, Old Harbor, Alaska, Aug. 5, 2018. The excavator aids the extension of the Old Harbor runway by scooping gravel for a wheel tractor-scraper to unload it onto the runway. (U.S. Marine Corps photo by Lance Cpl. Tessa D. Watts)