Two weeks ago, Senator Rand Paul asked then Secretary of State Hillary Clinton if Benghazi served as a gateway for the United States to run weapons to Syrian rebels through Turkey. Today during testimony on Capitol Hill, outgoing CIA director Leon Panetta admitted there was a plan, supported by Clinton and former CIA Director David Petreaus, put in place to arm Syrian rebels but was stopped by President Obama. Testifying before the Senate Armed Services Committee, Mr. Panetta and Gen. Martin E. Dempsey, the chairman of the Joint Chiefs of Staff, were asked by Senator John McCain, Republican of Arizona,...