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U.S. Air Force Airman Angel Guel, right, a 14th Aircraft Maintenance Unit crew chief, helps secure Col. Kristopher Struve, left, the 35th Fighter Wing commander, into the cockpit of an F-16 Fighting Falcon at Misawa Air Base, Japan, June 10, 2019. As a crew chief, his duties are extensive and include pre-and post-flight inspections, intake examinations and all-around maintenance.