U.S. Air Force Airman First Class Ryan Gunnar, left, and Airman First Class Christian Vazquez-Martinez, right, 7th Component Maintenance Squadron, consult their technical orders at Dyess Air Force Base, Texas, March 30, 2017. Gunnar and Vazquez perform maintenance on an accessory gear box from a B-1B Lancer engine. (U.S. Air Force Senior Airman Alexander Guerrero)