A U.S. Air Force crew chief, assigned to the 169th

A U.S. Air Force crew chief, assigned to the 169th Aircraft Maintenance Squadron from McEntire Joint National Guard Base of the South Carolina Air National Guard, cleans the canopy of an F-16 Block 52 fighter, Aug. 12, 2014 at Rionegro, Colombia, during Relampago (Lightning) 2014. Relampago is a combined air cooperation engagement with the Republic of Colombia. One hundred Airmen and six F-16s are participating in the first major joint-air training opportunity under the auspices of the South Carolina National Guard's State Partnership Program with the country of Colombia. (U.S. Air National Guard photo by Tech. Sgt. Jorge Intriago/Released)