Believe it or not, this was a bomber designed and prototyped in the 1950’s and tested until 1966. If could travel at Mach 3 (over 2000 miles per hour.

It was never put into production because at low altitudes it flew about the same speed as the B-52, and there was a question at higher altitudes because the first surface-to-air missiles were being deployed and nobody knew if they would be vulnerable.

Only two were built. the second one was destroyed in a mid-air collision in 1966.

It could not be challenged by any aircraft of the day. It was just too expensive to deploy in those early days.

And from this angle it looks like a Klingon battle cruiser. QaPla!

North American XB-70 Valkyrie