drone video around the only surviving North American XB-70 Valkyrie - National Museum USAF
[video & text : National Museum USAF]
The futuristic XB-70A was originally conceived in the 1950s as a high-altitude, nuclear strike bomber that could fly at Mach 3. The first XB-70A airplane continued to fly and generate valuable test data in the research program until it came to the museum in 1969.