A comparison of key findings in investigations into the 2012 attacks on the U.S. diplomatic post in Benghazi, Libya that killed U.S. ambassador Chris Stevens and three other Americans:

PREVENTING THE ATTACKS:

House Benghazi Committee Republicans, June 28, 2016: Faults the Obama administration for loose security at the post. There were rarely more than a handful of security personnel there, and the facility's design did not meet security requirements.

House Benghazi Committee Democrats, June 27, 2016: State Department security measures in Benghazi were inadequate as a result of decisions made by mid-level officials. U.S. intelligence received no advance warning of attacks.

Senate Intelligence Committee, bipartisan, January 2014: Attacks could have been prevented. U.S. intelligence didn't send enough warnings about the potential threat. The State Department could have closed the Benghazi facility until security was improved.

House Intelligence Committee, bipartisan, November 2014: U.S. diplomatic facility in Benghazi was insufficiently protected. State Department security agents knew they could not defend it from a well-armed attack.

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MILITARY RESPONSE:

House Benghazi Committee Republicans: Faults the Obama administration for indecision and inadequate reaction during the attack. U.S. military responded too slowly to the ongoing attack.

House Benghazi Committee Democrats: Military could have done nothing differently that would have prevented the attack.

Senate Intelligence Committee: U.S. military had no resources in position to quickly respond to attacks. Stevens twice declined the military's offer to keep a special operations team there, was trying to organize a local Libyan security team.

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On whether the military was ordered to stand down and not respond to the attacks:

House Benghazi Committee Republicans: President Barack Obama and Secretary of Defense Leon Panetta issued "clear orders" to deploy military assets to Benghazi, but nothing was sent.

House Benghazi Committee Democrats: No one issued a stand-down order.

Senate Intelligence Committee: Allegations of stand-down order not substantiated.

House Armed Services Committee Republicans, February 2014: No stand-down order issued, but there was confusion.

House Intelligence Committee: No stand-down orders issued to military or CIA response teams.

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HILLARY CLINTON:

House Benghazi Committee Republicans: No new evidence that Clinton, secretary of state at the time of the attack, is to blame for the facility's vulnerability or the U.S. response to the attacks.

House Benghazi Committee Democrats: Clinton never personally denied U.S. diplomats' requests for more security in Benghazi.

Senate Intelligence Committee: Does not mention her.