SAN FRANCISCO (CBS 5) — The head of the U.S. Senate’s Intelligence Committee said Wednesday that it appeared an intelligence mistake along with inadequate security were to blame for the Sept. 11 terrorist attack on the American Embassy in Benghazi, Libya that claimed the lives of Ambassador Chris Stevens, a Bay Area native, and three others. “I can tell you this, I think we do know what happened now. There’s no question but that it was a terrorist attack, there is no question but that the security was inadequate and I think that there is no question that we need...