The recently released House Intelligence Committee report on the Sept. 11, 2012, attack against an American diplomatic facility in Benghazi, Libya, was the seventh such inquiry since 2012. An eighth, led by a House select committee, began work this year.
Democrats accuse Republicans of politicizing the attack by launching endless investigations into the terrorist strike, which killed Ambassador J. Christopher Stevens and three U.S. staff members. They say persistent conspiracy theories about the attack have been debunked, often by GOP-led congressional committees.
Republicans insist questions remain and that some inquiries were flawed or inadequate.
Here's a look at some of the main questions raised about Benghazi and what investigations have concluded.
Were would-be rescuers ordered to stand down rather than head to the facility to try to rescue Stevens and his colleagues?
Reports say no:
"Appropriate U.S. personnel made reasonable tactical decisions that night, and the committee found no evidence that there was either a stand-down order or a denial of available air support."
House Intelligence Committee report, November 2014
"The progress report finds that officials at the Defense Department were monitoring the situation throughout and kept the forces that were initially deployed flowing into the region. No evidence has been provided to suggest these officials refused to deploy resources."
House Republican Conference report, April 2013
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The Benghazi, Libya, attack: What investigations have found