A probe by a congressional committee into the September 11, 2012 attack on a US compound in Benghazi has debunked allegations that President Barack Obama's administration fell down on the job.
Since the assault on the US mission in the Libyan city, which left the ambassador and three colleagues dead, the White House, CIA and State Department have been accused of mishandling their response.
But the report released yesterday by the House intelligence committee, which is led by some of Obama's fiercest Republican opponents, cleared the administration of all the most serious charges.
One claim investigated was that the Central Intelligence Agency had not provided adequate security for its own agents at an annex near the diplomatic mission, and the US had failed to send support.
But the report, based on thousands of hours of detailed investigation and interviews with both senior officials and agents who had been on the ground, stated that this had not been the case.
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