After the September 11 attacks in 2001 , Demarest was selected as one of two shift commanders for the PENTTBOM investigation . In that position , he led an ad hoc task force of over 400 federal , state , and local investigators from over 40 agencies to address the more than 5,500 PENTTBOM-related leads
September 11 attacks
September 11 attacks
Joseph M. Demarest