Aw, c'mon. You didn't think I was gonna make it that easy. Its the particular (very rare) variant of the B-36 that I'm looking for here.
That was one the DOE?? was using as a flying nuclear reactor test bed-they were actually thinking of trying to power aircraft with a nuclear reactor somehow?
"For joy of knowing what may not be known we take the golden road to Samarkand." James Elroy Flecker