Atomic bomb aircraft rebuilt and in DC

The newly assembled Enola Gay, the plane that dropped "Little Boy" on Hiroshima, Japan, on August 6, 1945, is going on display at the National Air & Space Museum.

I know scientists worldwide were racing to develop nuclear technology, and if we didn't figure it out first, someone else would have. But just for a second - let's wonder what life would be like without nuclear weapons? Would something worse have been developed?

Would we be a superpower today without the tactical policy of nuclear deterrence?