Issa Subpoenas Benghazi Probe Co-Chair

Will chat in a closed session about findings

The chairman of the House Oversight committee has issued a subpoena to compel the co-chairman of the independent review board that investigated last year's attack on the U.S. diplomatic mission in Benghazi, Libya, to answer questions about its findings in closed session.

California Republican Rep. Darrell Issa issued the subpoena on Friday to retired veteran diplomat Thomas Pickering to force him to appear at a deposition next Thursday.