Security told stand down in Benghazi incident leading to deaths

An account in the new book "13 Hours: The Inside Account of What Really Happened in Benghazi" by Mitchell Zuckoff with the Annex Security Team reveals a stand down order delayed a defensive response for around 30 minutes during an attack on a diplomatic compound which resulted in the deaths of U.S. ambassador Christopher Stevens along with three other American citizens. The security team eventually defied stand down orders but were not granted air support. Despite this account from the actual first responders the US government denies an stand down order.

Here is a link to the article on these revelations:

Top CIA officer in Benghazi delayed response to terrorist attack, US security team members claim [FOX]