Comment on SR-72: US secret hypersonic jet to allegedly break sound barrier in 2025 | Believed to be a top-secret project of the US Air Force, the SR-72 is touted to reach over 4,000 mph (6,437 kph), making i...

HulkSmashBurgers@reddthat.com ⁨10⁩ ⁨months⁩ ago