U.S. closes door to four snake species

Joseph Wasilewski, wildlife biologist, captures a wild python on the side of the Tamiami Trail road that cuts through the Florida Everglades on September 16, 2009 near Miami, Florida.
Joseph Wasilewski, wildlife biologist, captures a wild python on the side of the Tamiami Trail road that cuts through the Florida Everglades on September 16, 2009 near Miami, Florida.

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    U.S. closes door to four snake species

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U.S. Interior Department announces it is banning the importation of four snake species. CNN's John Zarrella reports.