Dr. Jill Biden hosts a National Guard Christmas Tree dedication in her office in the Eisenhower Executive Office Building, in Washington, D.C., Dec. 9, 2013. (Official White House Photo by David Lienemann)

Dr. Jill Biden hosts a National Guard Christmas Tree dedication in her office in the Eisenhower Executive Office Building, in Washington, D.C., Dec. 9, 2013. (Official White House Photo by David Lienemann)