(CNN) -- Eight weeks after the terrorist attacks on the U.S. mission in Benghazi, Libya, that killed four Americans, it is encouraging that Congress is finally serious about examining the events surrounding that day. As the chairman of the House Intelligence Committee, Rep. Mike Rogers, said on "Meet the Press" recently, this was not an intelligence failure. But failures clearly happened elsewhere, particularly in the State Department. State Department documents revealed that slain Ambassador to Libya Chris Stevens and others had warned several times of "growing problems with security" and violence in eastern Libya, where Benghazi is located, after the fall of Moammar Gadhafi and after the Transitional National Council moved its governing headquarters from Benghazi to Tripoli in September 2011. Stevens' predecessor Ambassador Gene Cretz had also sent cables to the State Department warning of the deepening security crisis in Libya.
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Marco Rubio: Answers from Congress' Benghazi inquiry will help prevent another tragedy
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Rubio: Ambassador Stevens, others warned of deepening security crisis
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Security at the U.S. consulate and the CIA annex was woefully inadequate, he says
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Rubio: It's critical U.S. helps support a secular, pro-American government in Libya
We also know that the @placeholder believed the Benghazi tragedy on September 11 was the work of terrorists within hours of the attacks.