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Crowd at political campaign rally for Barack Obama chanting "Yes We Can."
1:21
Presidential candidate Barack Obama speaking at a campaign rally, outdoors over a public address system.
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Presidential candidate Barack Obama speaking at a campaign rally, outdoors over a public address system.
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Presidential candidate Barack Obama speaking at a campaign rally, outdoors over a public address system.
1:21
Presidential candidate Barack Obama speaking at a campaign rally, outdoors over a public address system.
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Crowd chants "Yes we can" at political rally for presidential candidate Barack Obama.
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Crowd at a political rally for presidential candidate Barack Obama, chanting "Obama."
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Political rally for Barack Obama in Virginia in 2008.