‘Push the boundaries’: Is a new generation of the famed SR-71 Blackbird arriving?

A B-1B Lancer assigned to the 34th Expeditionary Bomb Squadron, Ellsworth Air Force Base, South Dakota, takes off during a training mission in support of Bomber Task Force 25-1 at Andersen Air Force Base, Guam, Feb. 24, 2025. (U.S. Air Force photo by Tech. Sgt. Robert M. Trujillo)NASA won't say what mystery aircraft is, but goal is 'getting back in the business of flying high and fast again'