Sen. Kerry: Clinton to testify on Benghazi attack report WASHINGTON Sen. John Kerry says Secretary of State Hillary Rodham Clinton has agreed to testify before the Senate Foreign Relations Committee about an independent report on the deadly Sept. 11 attack on the U.S. diplomatic mission in Libya. In a letter Friday to the panel's members, Kerry indicated that the report from the accountability review board headed by retired diplomat Thomas Pickering is imminent. The Massachusetts Democrat and committee chairman says he's asked that Pickering and retired Adm. Mike Mullen appear before the committee before Clinton. Mullen, the former chairman of the Joint Chiefs of Staff, is a member of the review board. The attack on the consulate in Benghazi killed U.S. Ambassador Chris Stevens and three other Americans. Clinton has also agreed to testify before the House Foreign Affairs Committee.