White House says four of its workers remain unaccounted for , and `` we fear the worst '' `` I 'll be angry for a long time , '' the brother of a Algeria man killed in the raid says . A former plant worker aided militant attackers , Texas says . The incursion succeeded in freeing some hostages -- but not all -- and several of them died . The BP again backs the Islamist response .
White House says four of its workers remain unaccounted for , and `` we fear the worst '' `` I 'll be angry for a long time , '' the brother of a Algeria man killed in the raid says . A former plant worker aided militant attackers , Texas says . The BP again backs the Islamist response .