Mezue ahịrịokwu na-esonụ: Site na Nọvemba 1999 ruo Nọvemba 2001, ọ bụ Director maka Transnational Threats na National Security Council (NSC) ndị ọrụ, ebe ọ bụ onye na-ahụ maka nhazi na mmejuputa iwu US na-emegide iyi ọha egwu. N'oge a, o duziri mmeghachi omume gọọmentị U.S. na egwu egwu nke Millennium,
Mwakpo nke USS "Cole", na mwakpo nke September 11. N'oge ya na NSC, Cressey kpọrọ oku ka e mee ihe megide al-Qaeda na Bin Laden, nke a leghaara anya ruo mgbe 9/11.