Five combat controllers from the Kentucky Air National Guard’s 123rd Special Tactics Squadron parachute into Barkley Regional Airport in Paducah, Ky., May 13, 2025, from a C-130J Super Hercules aircraft in support of Exercise Grindstone, a three-day earthquake-response scenario staged in the New Madrid Seismic Zone, the most active seismic area in the Eastern United States. The Airmen conducted an assessment of airfield operability and provided air traffic control for follow-on aircraft bringing troops, cargo and equipment needed to establish an aerial port for relief operations. (U.S. Air National Guard photo by Dale Greer)