Maryland Senator Benjamin L. Cardin (left) talks to Fort Meade Garrison Commander Col. Daniel L. Thomas (right) during Cardin's visit to the Environmental Protection Agency's Environmental Science Center on April 14 for the center's 10th Birthday cel...

Maryland Representative John Sarbanes (left) and Fort Meade Garrison Commander Col. Daniel L. Thomas (center) greet new Environmental Protection Agency Administrator Lisa Jackson shortly before the EPA Environmental Science Center 10th birthday celeb...

EPA Administrator Lisa Jackson greets Tad Davis, deputy assistant secretary of the Army for the environment, following a 10th birthday celebration for the EPA's Environmental Science Center on April 14. Jackson and Davis joined a group including Mary...