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SYCAMORE, PA - APRIL 13:  U.S. Environmental Protection Agency Administrator Scott Pruitt speaks with coal miners at the Harvey Mine on April 13, 2017  Sycamore, Pennsylvania. The Harvey Mine, owned by CNX Coal Resources, is part of the largest underground mining complex in the United States.  (Photo by Justin Merriman/Getty Images)
SYCAMORE, PA - APRIL 13:  U.S. Environmental Protection Agency Administrator Scott Pruitt speaks with coal miners at the Harvey Mine on April 13, 2017  Sycamore, Pennsylvania. The Harvey Mine, owned by CNX Coal Resources, is part of the largest underground mining complex in the United States.  (Photo by Justin Merriman/Getty Images)

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    EPA moving agents to provide 24/7 security

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EPA moving agents to provide 24/7 security

Scott Pruitt, the top federal official responsible for protecting the environment, is surrounded 24/7 by a cadre of agents because of the high number of threats against him. CNN's Rene March reports.

EPA moving agents to provide 24/7 security

Scott Pruitt, the top federal official responsible for protecting the environment, is surrounded 24/7 by a cadre of agents because of the high number of threats against him. CNN's Rene March reports.