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FILE - In this Jan. 6, 2016 file photo, House Benghazi Committee Chairman Rep. Trey Gowdy, R-S.C. walks on Capitol Hill in Washington. A senior Pentagon official criticized the House Republican-led investigation into the deadly attacks in Benghazi, Libya, saying the panel has made a "crescendo" of costly, duplicative and unnecessary requests, including some based on claims made on Facebook or talk radio. (AP Photo/J. Scott Applewhite, File)

FILE - In this Jan. 6, 2016 file photo, House Benghazi Committee Chairman Rep. Trey Gowdy, R-S.C. walks on Capitol Hill in Washington. A senior Pentagon official criticized the House Republican-led investigation into the deadly attacks in Benghazi, Libya, saying the panel has made a "crescendo" of costly, duplicative and unnecessary requests, including some based on claims made on Facebook or talk radio. (AP Photo/J. Scott Applewhite, File)

Libya in turmoil

4 March 2011

Violence continues to rage against the Gaddafi regime