The Network Centric Airborne Defense Element (NCADE) was an anti-ballistic missile system being developed by Raytheon for the Missile Defense Agency. On September 18, 2008, Raytheon announced it had been awarded a $10 million contract to continue NCADE research and development. The NCADE system is a boost phase interceptor based heavily on the AIM-120 AMRAAM, with the AMRAAM fragmentation warhead replaced by a hit-to-kill vehicle powered by a hydroxylammonium nitrate-based monopropellant rocket engines from Aerojet.