More and more it is looking really stupid that the B-70 was cancelled. Here are about 3 reasons why.

First since the B-52 is still a valued aircraft, why wouldnt an aircraft that flys twice as high and 4 times faster be better.

Second, since the SR-71 was never shot down, why wouldnt the B-70 achieve the same results.

Third, with all the large supersonic flying experience it would have had, cancelling it probably set aviation back 30 years. There is no reason we should not have supersonic transports flying all over the world right now.

Cancelling the B-70 was just a stupid political move.