President Barack Obama taps his microphone for sound, in the Rose Garden of the White House in Washington, Monday, Aug. 30, 2010, prior to his remarks on the economy. The audio system had unexpectedly gone silent during the first part of his speech. (AP Photo/Pablo Martinez Monsivais)

AP
President Barack Obama taps his microphone for sound, in the Rose Garden of the White House in Washington, Monday, Aug. 30, 2010,  prior to his remarks on the economy. The audio system had unexpectedly gone silent during the first part of his speech. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama taps his microphone for sound, in the Rose Garden of the White House in Washington, Monday, Aug. 30, 2010, prior to his remarks on the economy. The audio system had unexpectedly gone silent during the first part of his speech.
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