Thing about Nazi Germany Is that much of It Is shrouded In mystery. In 1942 I believe Nazi Germany's primary isotope separation plant was bombed putting them back several years. However there are rumors of isotope separation actually occurring In 1944. And Hitler had quite a few of his chips into the nuclear bomb basket considering It a wunderwaffe. Had the Nazi's been given half a year they could easily have constructed a bomb, and logically they'd attach It to a V-2 and just send It flying towards Moscow considering that exact precision Isn't really needed with a weapon of such magnitude. Look at It this way, Germany was ahead of the nuclear game for most of the war, In 1942 a critical blow was dealt. However there Is something to be said about how critical the allies took Germany's nuclear program. In 1945 when the allies determined that the Oranienburg Plant would be left to the soviets at the end of the war they dropped about 1000 tons of explosives on It. Needless to say they wouldn't have been so worried If Germany wasn't close to something. What that something Is could be isotope enrichment, or perhaps even a full on breakthrough, considering during the downfall of Germany the command structure was so broken up Hitler didn't even know what divisions he had, let alone what his scientists were doing. And they already had a plan for when they had the bomb. They would attach It to a suborbital plane so It could use the speed It accumulated from entering and exiting the dense atmosphere to reach the mainland US, this was ditched due to the heat that the plane would encounter. ( Not a scientist so my explanation Is shit, Im sure someone here knows the exact details ). So It Isn't as If they had no plans what so ever.