Stealth technology also known as LO technology (low observable technology) is a sub-discipline of military electronic countermeasures
Project Isinglass was the code name given to two heavily classified, manned reconnaissance aircraft studied by the Central Intelligence Agency (CIA)
The Lockheed F-117 Nighthawk is a stealth ground attack aircraft formerly operated by the United States Air Force.
The Northrop Grumman B-2 Spirit is a multirole heavy bomber with "low observable" stealth technology...
The A-12 Avenger II was an American aircraft program from McDonnell Douglas and General Dynamics