ABC News breaks the story about the US State Dept.'s top lieutenant to Sec. Hillary Clinton revising the CIA talking points about Benghazi. John Carlson spotlights the major focus on this news and Sec. Clinton's Jan 23rd , 2013 US Senate testimony, where she famously said "what difference does it make". If you only listen to one report or summary of this critical Benghazi story, listen to this recap by KVI's John Carlson.