FBI , Department of Homeland Security issue bulletin Thursday . One Islamist Web site repeated the claim , but that Web site is not considered a reliable source for Islamist messages by experts in the field . Bulletin says two al Qaeda associates made claim to news agency . `` We terminated the most precious American asset , '' associate says . Comment:
FBI , Department of Homeland Security issue bulletin Thursday . Bulletin says two al Qaeda associates made claim to news agency . `` We terminated the most precious American asset , '' associate says . Comment: