Everytime someone says the radiation left over on Hiroshima and Nagasaki would make it uninhabitable it makes me cringe, the radiation levels are far smaller then bombs today have. The reason being is those were some of the first bombs ever made, we learned alot from those two drops and the simple fact that people use this poor logic when they dont even beleive in missles makes me cringe even more. Do your research on the -inside- first before you begin spouting nonsense.
Not to mention:
http://en.wikipedia.org/wiki/Tsar_BombaMostly this part right here, The original U.S. estimate of the yield was 57 Mt, but since 1991 all Russian sources have stated its yield as 50 Mt. Khrushchev warned in a filmed speech to the Communist Parliament of the existence of a 100 Mt bomb (technically the design was capable of this yield). The fireball touched the ground[dubious – discuss], reached nearly as high as the altitude of the release plane and was seen and felt almost 1,000 kilometres (620 mi) from ground zero. The heat from the explosion could have caused third degree burns 100 km (62 miles) away from ground zero. The subsequent mushroom cloud was about 64 kilometres (40 mi) high (nearly seven times the height of Mount Everest), which meant that the cloud was well inside the Mesosphere when it peaked. The base of the cloud was 40 kilometres (25 mi) wide. The explosion could be seen and felt in Finland[citation needed] , breaking windows there and in Sweden.[citation needed] Atmospheric focusing caused blast damage up to 1,000 kilometres (620 mi) away. The seismic shock created by the detonation was measurable even on its third passage around the Earth.[6] Its seismic body wave magnitude was about 5 to 5.25.[7] The energy yield was around 7.1 on the Richter scale but, since the bomb was detonated in air rather than underground, most of the energy was not converted to seismic waves.
You can click on each reference site link on the article, full proof and full evidence. I bid ye, a good day.