From left to right, Horace Henry, Maryland’s Forestry Service southern region urban and community forestry coordinator, Col. Brad Hoagland, 11th Wing commander, Julie Kutruff, National Capital Parks eastern district manager, commemorate Earth Day and Arbor Day outside Building 1657 at Joint Base Andrews, Md., April 22, 2015. They planted three white oaks, Maryland’s state tree, to signify JBA’s commitment to preserving environmental sustainability. (U.S. Air Force photo/Airman 1st Class Philip Bryant)