U.S. Air Force Airmen assigned to the 8th Civil Engineer Squadron perform maintenance by extending and flipping the barrier tape on the aircraft arresting system at Kunsan Air Base, Republic of Korea, Sept. 9, 2017. The nylon tape that is used has a lifespan of approximately four years, but needs to be flipped every two years due to normal wear and tear. Civil Engineers perform this maintenance to prevent the tape from improperly snapping and potentially causing severe damage to the aircraft in the event of an in-flight emergency. (U.S. Air Force photo by Staff Sgt. Victoria H. Taylor)