One of three built EC-135J Silver Dollar. Heavily-modified as an electronic warfare aircraft and command post at nuclear conflict. Its successor is E-4B.
The EC-130Q was used to communicate with US Navy submarines while they remained submerged. To achieve this a 30,000ft antenna was spooled out behind the aircraft to transfer data with very low frequency (VLF) signals that could penetrate sea water.
The first Boeing YC-14 (72-1873) entrant into the USAF's Advanced Medium STOL Transport (AMST) competition, which aimed to replace the C-130 Hercules as the USAF's standard STOL tactical transport.