Having served in the AF Security Service (the "blue" men group for the NSA) back in the late '60s we used to track the SR71 going from Okinawa to Viet Nam by listening to unfriendly radar tracking.

The Blackbird would take off and fly a commercial route til suddenly they kicked in the engines and went nearly vertical. Tracking of "normal" planes would involve perhaps hundreds of location updates. Suddenly the "abnormal" aircraft would fly in and out of the region with 3 -4 total tracking references. While the true top speed is still not talked about, back then when we mapped out the route and used the tracking references to validate, it sure looked in the range of mach 6....

Stogey, I sure enjoyed watching the video and especially appreciated the "spacesuit" flight suit the pilor wore. Check the locking collar fitting for the presurized suit and helmet. There is something you don't see every day. Unless you're piloting the space shuttle.

The SR71 was so far ahead of its time in the '60s that if it were introduced today, it would still look and perform futuristic!