FBI (Federal Bureau of Investigation) - CIA (Central Intelligence Agency) Clash

Only the FBI has the authority to block people from entering the USA, but the CIA refused to notify the FBI about Al Qaeda 2001-09-11 terrorists with valid visas about to enter the USA. CIA workers complained that had they done so, they would have been instantly fired. Who is the CIA protecting, bin Laden and his fellow conspirators inside and outside the USA or the USA?

~ Roedy (1948-02-04 age:69)