Centrist Sen. Specter died fighting for moderation - Article Photos 7/10

FILE - In a May 27, 2010 file photo, President Barack Obama greets Sen. Arlen Specter, D-Pa., at an event honoring Jewish American Heritage Month in the East Room of the White House in Washington. Former U.S. Sen. Arlen Specter, longtime Senate moderate and architect of one-bullet theory in JFK death, died Sunday, Oct. 14, 2012. He was 82. (AP Photo/Charles Dharapak, File)