On the left, U.S. Air Force Lt. Col. Paul Frantz, 718th Civil Engineer Squadron commander, and right, Col. Kenneth Crooks, 18th Wing chaplain, dig holes for trees during the Team Kadena Earth Day 2019 event April 29, 2019, at Kadena Air Base, Japan. Celebrated annually, Earth Day is the largest, most celebrated environmental event worldwide with more than 175 countries and one billion people commemorating the day each year. (U.S. Air Force photo by Staff Sgt. Benjamin Sutton)