A pilot performs preflight checks on a B-52 Stratofortress at Royal Air Force Fairford, England, Sept. 19, 2017, for a mission in support of bomber assurance and deterrence operations. U.S. Strategic Command bomber forces regularly conduct combined theater security cooperation engagements with allies and partners, demonstrating the U.S. capability to command, control and conduct bomber missions across the globe. Air Force photo by Tech. Sgt. Joshua J. Garcia