President Barack Obama and first lady Michelle Obama welcome military families to an Independence Day celebration on the South Lawn of the White House in Washington, Monday, July 4, 2011. (AP Photo/Charles Dharapak)

Associated Press
President Barack Obama and first lady Michelle Obama welcome military families to an Independence Day celebration on the South Lawn of the White House in Washington, Monday, July 4, 2011. (AP Photo/Charles Dharapak)
President Barack Obama and first lady Michelle Obama welcome military families to an Independence Day celebration on the South Lawn of the White House in Washington, Monday, July 4, 2011. (AP Photo/Charles Dharapak)
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