Muhammad Ali receives the Liberty Medal

<div class="meta image-caption"><div class="origin-logo origin-image "><span></span></div><span class="caption-text">Actor Terrence Howard speaks before retired boxing champion Muhammad Ali receives the Liberty Medal during a ceremony at the National Constitution Center, Thursday, Sept. 13, 2012, in Philadelphia. The honor is given annually to an individual who displays courage and conviction while striving to secure liberty for people worldwide. &#40;AP Photo&#47;Matt Rourke&#41; </span></div>
September 13, 2012 5:49:09 PM PDT