WASHINGTON, Feb. 8 (UPI) -- There were no adequate warnings about the 2012 attack on the U.S. consulate in Benghazi for an armed response, said U.S. Defense Secretary Leon Panetta.

U.S. Ambassador to Libya Chris Stevens and three of his staff members died in what the U.S. State Department said was a terrorist attack Sept. 11, 2012, on the diplomatic post in Benghazi.