Found and Explained Official on MSN

This Plane Doesn't 'Exist'... Aurora Top Secret Spy Plane SR-91

At the end of the SR-71 spy plane program in the 90s, the US was left without a new spy plane to operate across the world.
National Security Journal on MSN

In 3 Words: Why America Needs the Mach 6 Miracle SR-72 Son of Blackbird

Bottom Line in 3 Words: speed buys options. A Mach 6 SR-72 could slash enemy reaction time, sprint into denied airspace, and ...