|Effect||Obtain the only ICBM in the game|
Building this wonder allows you to build an ICBM (Inter-Continental Ballistic Missile) that will instantly destroy anything, besides a player's capital, in a square. There is only one Manhattan Project and only one missile, so use it wisely.
In real life, after the Manhattan Project was completed in the 1940s, we did not have ICBMs, and instead this wonder gave only an atomic bomb. As a side note, Semi-Continental Ballistic Missiles had been invented by Nazi Germany. These missiles were called V-2 rockets. However, they were not armed with nuclear warheads, and instead were only armed with conventional bombs. Another thing of note was that the predecessor of the ICBM, the V-2 rocket, eventually ushered in the Space Age after the scientists who created the V-2 rocket and the technology in general were also used to launch the first Artificial Satellites at the end of the 1950s.