The Washington Nationals mascot, "Screech," visits team Andrews members at high altitude chamber training in Aero Space Physiology during a base tour here April 24. The purpose of the visit was to see and learn about the missions on Joint Base Andrews. During the visit Screech and his video team collected footage for Joint Service Open House promotional videos being shown at Andrews Night at the Washington Nationals May 16. (U.S. Air Force photo/ Airman 1st Class Aaron Stout)