President Barack Obama dances with Air Force Staff Sgt. Bria Nelson, and First Lady Michelle Obama dances with Marine Corps Gunnery Sgt. Timothy Easterling during the Commander in Chief Ball at the Walter E. Washington Convention Center in Washington, D.C., Jan. 21. DOD photo by Army Sgt. 1st Class Tyrone C. Marshall Jr. President Barack Obama dances with Air Force Staff Sgt. Bria Nelson, and First Lady Michelle Obama dances with Marine Corps Gunnery Sgt. Timothy Easterling during the Commander in Chief Ball at the Walter E. Washington Convention Center in Washington, D.C., Jan. 21. DOD photo by Army Sgt. 1st Class Tyrone C. Marshall Jr. SHARE: Download: Full Size (1.01 MB) Credit: VIRIN: 144568-X-EYW06-590.jpg Photo Gallery