ROYAL AIR FORCE LAKENHEATH, England -- Jaheim Mesween (right), RAFL High School student, explains to Thomas Witney, RAFL High School principal, and shows Betty Welsh, wife of Gen. Mark A. Welsh III, United States Air Forces in Europe commander, the assignment for his Engineering, Design and Technology class, Jan. 18, 2012. Welsh, her husband, and Command Chief Master Sgt. David Williamson and his wife Mary, visited RAF Lakenheath to express their gratitude for the hard work and dedication of the Liberty warriors and their families, and to discuss upcoming changes in today's Air Force. (U.S. Air Force photo/Senior Airman Lausanne Morgan)