ABERDEEN PROVING GROUND, Md. - (From left, front) Garrison Deputy Glenn Wait, APG Garrison Commander Col. Gregory McClinton, John Wrobel, acting chief of the DPW natural resources branch and Garrison Command Sgt. Maj. James Ervin plant a pin oak seedling in the Garrison garden to celebrate Arbor Day, April 2, as environmental staff members (from left, rear) Dr. Deidre DeRoia, Kate Aichroth, JanMichael Graine, Jessica Baylor and Mascot Smokey the Bear , from the U.S. Forest Service and the National Association of State Foresters, look on after the Tree City USA award ceremony at the Garrison headquarters Bldg. 305.