You actually wouldn't need a radiation suit. From what I've read, it's safe to visit there now. It's not save to live there though because there are dangerous levels of radiation in the ground and in the water supply.
I watched a documentary on the Sci Fi channel on what the world would be like if people suddenly disappeared. They went over some pointers on what would happen in six months, one year, two years, five years, ten years, twenty years, etc..... It was pretty scary. They used Chernobyl as a model.
I think it was called a "world without people" awesome documentary.
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