SYCAMORE, PA - APRIL 13: Donnie Claycomb, 27, of Limestone, West Virginia., who has been mining for 6 years, stands in front of an American flag prior to an event with U.S. Environmental Protection Agency Administrator Scott Pruitt at the Harvey Mine on April 13, 2017 in 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: Miner's tags hang on a board at the Harvey Mine on April 13, 2017 in Sycamore, Pennsylvania. The Harvey Mine, owned by CNX Coal Resources, is part of the largest underground mining complex in the United States. Environmental Protection Agency Administrator Scott Pruitt visited the mine on Thursday and spoke with miners. (Photo by Justin Merriman/Getty Images)
SYCAMORE, PA - APRIL 13: Coal miner Terry Ramer, 32, of Belle Vernon, Pennsylvania., stands near the portal to the Harvey Mine on April 13, 2017 in Sycamore, Pennsylvania. The Harvey Mine, owned by CNX Coal Resources, is part of the largest underground mining complex in the United States. U.S. Environmental Protection Agency Administrator Scott Pruitt visited the mine and spoke with miners on Thursday. (Photo by Justin Merriman/Getty Images)
SYCAMORE, PA - APRIL 13: Coal miner Matt Wolfe, 32, of Blacksville, West Virginia, who has been mining for 10 years, waits for the arrival of U.S. Environmental Protection Agency Administrator Scott Pruitt who visited the Harvey Mine on April 13, 2017 in 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 holds up a miner's helmet that he was given after speaking with coal miners at the Harvey Mine on April 13, 2017 in 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: Coal miners wait for the start of an event with U.S. Environmental Protection Agency Administrator Scott Pruitt who visited the mine and spoke with miners at the Harvey Mine on April 13, 2017 in 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: Coal miner Jaden Fredrickson, 26, of Cheat Lake, West Virginia, waits for the arrival of U.S. Environmental Protection Agency Administrator Scott Pruitt who visited the Harvey Mine on April 13, 2017 in Sycamore, Pennsylvania. The Harvey Mine, owned by CNX Coal Resources, is part of the largest underground mining complexes in the United States. (Photo by Justin Merriman/Getty Images)
EPA Administer Scott Pruitt visited CNX Coal Resources' Harvey Mine, part of the largest underground mining complex in the United States, and spoke with miners on April 13, 2017 in Sycamore, Pa. You can view the images at Getty Images.