Ow does the NSC and APNSA operate? Please include the four core statutory members

Please describe how the NSC (National Security Council) and APNSA (Assistant to the President for National Security) operates. Just cover a few of the past APNSA members, their critical roles, or famous blunders like Sandy Berger and the Chinese nuclear espionage and the unauthorized removal of classified materials. Condoleezza Rice, Tom Donilon, and the present APNSA.
There is plenty of wiggle room with this essay. Contact me if you need to. Im not usually too picky.