Members of Team Lackland celebrate Arbor Day by planting a tree at the new youth center May 19, 2008. Lackland has been observing the Arbor Day tradition since its designation as a Tree City USA community by the National Arbor Day Foundation in 1993. (USAF photo by Meredith Canales)

Members of Team Lackland take turns filling in the dirt for a new tree planted at the youth center in celebration of Arbor Day. Lackland's trees eliminate more than 80,000 tons of air pollution annually by removing air pollution created from industries and vehicles and producing clean oxygen. (USAF photo by Meredith Canales)