Honorable William "Bill" Anderson (center), Assistant Secretary of the Air Force for Installations, Environment and Logistics, Washington, D.C., is briefed by Col. (Dr.) Bryon Hepburn, 60th Medical Group commander (right), and Col. (Dr.) Michael Chyrek (left), 60th Aerospace Medicine Squadron acting commander during a visit to Travis April 13. Mr. Anderson's tour and briefing at DGMC included operational/occupational medicine, the aeromedical staging facility, hyperbarics medicine, flight medicine, public health and bioenvironmental engineering. (U.S. Air Force photo by Jim Spellman)