They did NOT have the mission to protect the Ambassador, nor to protect the Consulate. They ran to the sound of gunfire, to protect lives, though that was NOT their mission. I point you to the site that put the evidence together.
The truth is: they heard the attack, they heard the gunfire, and despite the danger to themselves they rushed into the breach taking weapons from the frightened Libyan security officials to help protect the American Consulate, Ambassador Stevens and his embassy aide Sean Smith.Both Tyrone Woods and Glen Doherty were under no obligation to assist, protect or defend Stevens.
How many more things has this Administration lied about? Why did they lie about this? Read the full story at the link above.