This is the Aurora Black Triangle,a top-secret aircraft that was supposedly never built.
With new multi-static anti-stealth radar arrays and more advanced integrated air defense systems continuing to come online, the U.S. Air Force has stated plainly that it believes even the mighty F-22 Raptor will no longer be survivable enough in near-peer contested airspace as soon as 2030. The Raptor is widely considered to be the stealthiest fighter ever to take to the skies, so the broader context one can glean from concerns about its survivability is clear: the US needs a slew of new offensive and defensive warplanes it can rely on to dominate the skies over its opponents. If need be, these warplanes will also have to defend our own airspace against a sea of new stealth fighters and bombers seeing hurried development under Chinese and Russian banners.
When the SR-71 spy plane program ended in the 90s, the US was left without a new spy plane to operate across the world.
Its successor, the SR-72 is still decades away, which means the US military has flown blind for the last 30 years.
Here’s New Gigantic Secret US Spy Jet Fighter