미국에서 가장 큰 대테러단체는 무엇인가?
The Counterterrorism Division (CTD) is a division of the National Security Branch of the Federal Bureau of Investigation. CTD terrorist threats inside the United States, provides information on terrorists outside the country, and tracks known terrorists worldwide. In the wake of the September 11, 2001 attacks, CTD's funding and manpower have significantly increased. 
Counterterrorism Division