Democratic presidential candidate Sen. Barack Obama (D-IL) and Sen. Hillary Rodham Clinton (D-NY) prepare to board Obama's campaign plane at Reagan National Airport June 27, 2008 in Washington, DC. Obama and Clinton will appear together at a campaign event in Unity, New Hampshire today. The former presidential rivals are appearing together in a show of unity for Obama's presidential campaign.
(June 27, 2008 - Source: Mario Tama/Getty Images North America)
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