I can't imagine the incredibly sick feeling that must ensue
following the destruction of such an expensive development
aircraft like the XB-70.

If memory serves me right, I
believe that the XB-70 that crashed was actually the later
design varient ( articulating wings ). Makes you wonder
how a company could absorb such a loss. To put it in context,
how would an automaker today deal with an auto development
project that ended in failure?
Nuch