&gt; Even as the bombers were being assembled, defense officials were planning their replacement, but each plan was undone by its own complexity. First was a nuclear-powered bomber able to stay aloft for weeks (too radioactive), then the supersonic B-58 with dartlike wings (kept crashing), and then the even faster B-70 (spewed highly toxic exhaust).<p>Second system syndrome at its finest.<p>Sounds like what they really want is a new implementation of roughly the same design as the B-52.