This Dec. 5, 2014 file photo shows a grizzly bear roams his pen, at Denver Zoo. In forty years, the U.S. government has spent billions of dollars trying to save some 1,500 species deemed endangered. ... more 
This Dec. 5, 2014 file photo shows a grizzly bear roams his pen, at Denver Zoo. In forty years, the U.S. government has spent billions of dollars trying to save some 1,500 species deemed endangered. House Republicans say that's translated into just 2 percent of protected species being recovered, and they want to overhaul the Endangered Species Act. Environmentalists and many Democrats credit the act with saving species from extinction. (AP Photo/Brennan Linsley,File) less 
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Associated Press | Photo By Brennan Linsley,File
Tue, Feb 4, 2014 1:09 PM EST