Noun
NEACP (plural NEACPs)
(US, military) Initialism of National Emergency Airborne Command Post: a Boeing E-4 aircraft operated by the US Air Force in emergencies.
SAC also maintained the National Emergency Airborne Command Post (NEACP, pronounced "kneecap"), also known as "Looking Glass," which consisted of several EC-135s, one of which was airborne at all times from 1961 through 1990. Source: Internet