The 818 was Boeing's entry into the TFX competition for a new USAF bomber and interceptor for the Navy. Despite winning, it was not built.
Playlist - Boeing

The Ma-31; America’s Russian Anti-Ship Missile
When the US Navy was looking for a new supersonic drone to test their defensive systems, McDonnell Douglas had a rather clever idea…

US Army Narrows Down Contenders for Future Attack Helicopter
The US Army’s Future Attack Reconnaissance Aircraft program has been narrowed down to two contenders; Sikorsky’s Raider X and Bell’s 360 Invictus.

Saab Gripen Goes Up Against F-18E and F-35 for Canadian Fighter Contract
Saab, Boeing and Lockheed are all fighting to offer the best deal to the Canadian government for the next Royal Canadian Air Force fighter.