Just minutes after 35 jihadists crashed through the U.S. diplomatic compound in Benghazi, Libya, nearly one year ago, the facility got word to the State Department, FBI and Pentagon that terrorists were attacking, according to a forthcoming book that provides the fullest review of the assault to date.

In “Under Fire, the Untold Story of the Attack in Benghazi,” it is revealed that an unidentified security official in the Benghazi compound protecting Ambassador J. Christopher Stevens messaged the U.S. embassy in Tripoli: “Benghazi under fire, terrorist attack.” Stevens and three others died that night.