U.S. Air Force Airman 1st Class Patrick O'Connell, a 35th Maintenance Squadron crew chief, checks flight controls during exercise Keen Sword 17, at Misawa Air Base, Japan, Nov. 10, 2016. Exercises like Keen Sword are a decisive demonstration of the strength of the friendship between the people, and provide an indispensible field training environment for enhancing mutual understanding of each country's tactics, communication protocols, procedutres and general interoperability. (U.S. Air Force photo by Airman 1st Class Sadie Colbert)