Russia Panic: US Is Testing New SR-72 Darkstar Hypersonic Aircraft – Hello everyone and welcome back to the EnTech channelThe Lockheed Martin SR-72, colloquially referred to as “Son of Blackbird”, is an American hypersonic UAV concept intended for intelligence, surveillance, and reconnaissance (ISR) proposed privately in 2013 by Lockheed Martin as a successor to the retired Lockheed SR-71 Blackbird. The company expected an SR-72 test vehicle could fly by 2025.Other Videos You May Like : – Russia Panic: F-35 Stealth Fighter Jet After Upgrade Is Truly Unstoppable – https://youtu.be/g0Ppjwhwydk- Here’s The Only Plane That Could Beat The F-22 Raptor -https://youtu.be/aSzb_VzdELQ- Russia Panic: US Finally Revealed The First 6th Generation Fighter Jet – https://youtu.be/b6XKV6ZC1EU#sr71darkstar #hypersonicaircratf