U.S. President Barack Obama (2nd R) shares a laugh with his wife first lady Michelle Obama (R) as Vice President Joe Biden (L) and his wife Dr. Jill Biden look on during the launch of “Joining Forces”, a national initiative in support of service members and their families, in the East Room at the White House in Washington, April 12, 2011. REUTERS/Jim Young (UNITED STATES – Tags: POLITICS MILITARY)