Developing:
Missing Air Algerie flight has crashed, says Algerian aviation official

President Barack Obama steps off Marine One helicopter during his arrival on the South Lawn of the White House in Washington, early Thursday, Aug., 4, 2011. Obama traveled to Chicago for a DNC fundraiser and a 50th birthday celebration for Obama. (AP Photo/Pablo Martinez Monsivais)

Associated Press
President Barack Obama steps off Marine One helicopter during his arrival on the South Lawn of the White House in Washington, early Thursday, Aug., 4, 2011. Obama traveled to Chicago for a DNC fundraiser and a 50th birthday celebration for Obama. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama steps off Marine One helicopter during his arrival on the South Lawn of the White House in Washington, early Thursday, Aug., 4, 2011. Obama traveled to Chicago for a DNC fundraiser and a 50th birthday celebration for Obama. (AP Photo/Pablo Martinez Monsivais)
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