2010: President Obama visits Chicago

<div class="meta "><span class="caption-text ">President Barack Obama points towards visitors singing &#34;Happy Birthday&#34; to him as he walks towards Marine One helicopter on the South Lawn of the White House in Washington, Wednesday, Aug. 4, 2010. prior to traveling to Chicago. &#40;AP Photo&#47;Charles Dharapak&#41; ( &#40;AP Photo&#47;Charles Dharapak&#41;)</span></div>
August 4, 2010 10:00:00 PM PDT