A Tokyo Metropolitan Police Department <PERSON> unit drags a training dummy during a Police Week K-9 Unit Ruck March competition, May 19, 2017, at Yokota Air Base, Japan. The Ruck March competition consisted of: a dog carry up five flights of stairs, scent detection challenge, low-crawl, barricade jumps, and dummy drag while carrying a 35 pound pack and running between each obstacle totaling five miles. (U.S. Air Force photo by <PERSON>)