FBI goes on biggest hiring drive since 2000 . Postings on www.fbijobs.gov show 850 agents , 500 support staffers . Again , attrition responsible for openings , FBI says .
FBI goes on biggest hiring blitz since 9/11 . Postings on www.fbijobs.gov seek 850 agents , 2,100 support staffers . Retirements , attrition responsible for openings , FBI says .