RE: Wikileaks

What if this happened
70 years ago and Manhattan Project was leaked to the nazis
(or even the soviets)?

It was leaked to the Soviets.  While Joe McCarthy was able to find 1000000%
of the communist activists working for the Soviet Union in the United States
(names kept in his locked briefcase), there were indeed sympathizers to the
Soviet Union who got them some information. People were convicted of this.
The latest I got was that the information given allowed them to skip the
dangerous step of "tickling the dragon's tail" to determine experimentally
what critical mass was. 

http://www.cfo.doe.gov/me70/manhattan/espionage.htm

Dan M.