A man smokes marijuana outside Uruguay's parliament in Montevideo on Wednesday, where lawmakers in the lower house debated and passed a bill that would legalize marijuana and regulate its production and distribution. Matilde Campodonico/AP hide caption

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The United States Supreme Court: a temple to complexity and self-reinforcing feedback loops? Chip Somodevilla/Getty Images hide caption

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The number of new drug shortages each year in the U.S., from 2001 through Dec. 21, 2012. University of Utah hide caption

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