Bloomberg, in Aspen, rails against legal weed

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Researchers want to know whether medical marijuana is effective in controlling seizures in kids.

Former New York City Mayor Michael Bloomberg has sharply criticized Colorado's decision to legalize marijuana and called it a terrible idea.

Bloomberg said at a meeting at the Aspen Institute on Friday that marijuana is hurting the developing minds of children. He admitted to smoking a joint in the 1960s, but he said the drug is stronger, more accessible and more damaging today.