The First Lady and Dr. Biden kick off a Joining Forces Community Challenge event on the South Lawn of the White House, April 11, 2012.

Sherman and Tammie Gillums look at their pictures with the First Lady at the Joining Forces Community Challenge at the White House, April 11, 2012.

The First Lady and Dr. Biden attend a Joining Forces nurses event at the University of Pennsylvania in Philadelphia, Pennsylvania, April 11, 2012.

Participants listen as the First Lady delivers remarks during a nurses event at the University of Pennsylvania in Philadelphia, Pa., April 11, 2012.

The First Lady and Dr. Biden attend a Joining Forces nurses event at the University of Pennsylvania in Philadelphia, Pennsylvania, April 11, 2012.

Dr. Jill Biden greets guests following a Joining Forces event at the University of Pennsylvania in Philadelphia, Pa., April 11, 2012.

The First Lady is interviewed by Stephen Colbert at the Colbert Report Studio in New York, N.Y., April 11, 2012.

The First Lady delivers remarks the Joining Forces initiative, at Kansas City Southern Railroad Yard in Shreveport, La., April 12, 2012.

The First Lady is briefed before a Joining Forces event at Jacksonville Naval Air Station, Jacksonville, Fla., April 12, 2012.

Sailors wait on the edge of a aircraft hangar before a Joining Forces event at Jacksonville Naval Air Station in Jacksonville, Fla., April 12, 2012.

The First Lady participates in prom fashion show segment at the Jacksonville Naval Air Station in Jacksonville, Fla., April 12, 2012.

Audience members photograph during a Joining Forces event at the Jacksonville Naval Air Station in Jacksonville, Fla., April 12, 2012.

Choreographer Rosero McCoy teaches the First Lady a dance during an event at Jacksonville Naval Air Station in Jacksonville, Fla., April 12, 2012.

The First Lady speaks during the launch of Joining Forces in the East Room, April 12, 2010.

The First Lady and Dr. Biden participate in a taping on the set of "Sesame Street" in Astoria, N.Y., April 18, 2011

The First Lady participates in a panel discussion at the Writer's Guild of America in Los Angeles, Calif.

The First Lady huddles with military family children at Nationals Park in Washington, D.C., July 5, 2011.

The First Lady visits the Naval Air Station Oceana Summer Camp in Virginia Beach, Va., July 21, 2011.

The First Lady reacts as the Jubilee House is revealed in Fayetteville, N.C., July 21, 2011.

The First Lady talks with a girl during a Military Family Cookout at the New Hampshire National Guard headquarters in Concord, N.H., July 2

The First Lady and Dr. Biden paint a wall in the home of Sgt. Johnny Agbi, Jr., left, in Washington, D.C., Oct. 17, 2011.

The President and First Lady have lunch with active duty and retired military personnel at a restaurant in Hampton, Va., Oct. 19, 2011.

The First Lady and Dr. Biden attend Game 1 of the World Series with Marine Lance Cpl. James Sperry and his daughter in St. Louis, Mo., Oct. 19, 2011.

The First Lady delivers remarks at the U.S. Chamber of Commerce’s “Business Steps Up: Hiring Our Heroes” event in Washington, D.C., Nov. 10, 2011.

The First Lady and Dr. Biden watch a NASCAR race with military families at the Homestead-Miami Speedway in Homestead, Fla., Nov. 20, 2011.

The President signs the Veterans Opportunity to Work to Hire Heroes Act of 2011 in the South Court Auditorium, Nov. 21, 2011.

The First Lady walks with children past the official White House Christmas Tree in the Blue Room, Nov. 30, 2011.

The First Lady introduces President Barack Obama at Pope Army Airfield in Fort Bragg, N.C., Dec. 14, 2011.

The President and First Lady greet troops at Pope Army Airfield, Fort Bragg, N.C., Dec. 14, 2011.

The First Lady shakes hands with veterans and medical personnel at Virginia Commonwealth University AAMC-Medical Center in Richmond, Jan. 11, 2012.

The First Lady attends an iCarly screening at Hayfield Secondary School in Alexandria, Va., Jan. 13, 2012.

Dr. Biden greets wounded warriors and their families at the Wounded Warrior Hope and Care Center at Camp Pendleton, Calif., Jan. 20, 2012.

The First Lady visits the dining facility at Little Rock Air Force Base in Little Rock, Ark., Feb. 9, 2012.

The First Lady walks with participants in the Defending the Blue Line program in Minneapolis, Minn., March 16, 2012.

The First Lady is photographed with a guest during the Department of Defense dinner in the East Room of the White House, Feb. 29, 2012.

The First Lady and Dr. Biden stand for the national anthem at the Pentagon in Arlington, Va., Feb. 15, 2012.

A message written by First Lady is seen on a U.S. Marine Corps flag at Walter Reed National Military Medical Center in Bethesda, Md., April 4, 2012.