Metals and minerals industry

President Donald Trump speaks at the National Association of REALTORS Legislative Meetings and Trade Expo, Friday, May 17, 2019, in Washington. (AP Photo/Alex Brandon)

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A power plant steams behind steel works of German steelmaker Thyssenkrupp in Duisburg, Germany, Thursday, May 9, 2019. Steelmaking giant Thyssenkrupp of Germany says it expects European antitrust regulators to block its plan to combine its European operations with India's Tata Steel. (AP Photo/Martin Meissner)

FILE- In this Nov. 29, 2006, file photo, steam rises from the huge boiler units at the coal-fired Jim Bridger Power Plant east of Rock Springs, Wyo. U.S. demand for coal to generate electricity will continue to weaken in coming months despite efforts by the Trump administration to prop up the struggling industry, federal officials said Thursday, May 9, 2019. Renewable energy sources are expected to fill much of the gap left by coal’s decline, according to the Energy Information Administration. (Jeff Gearino/The Casper Star-Tribune via AP, File)

FILE - In this May 31, 2012 file photo, an Iranian worker cuts a steel roll at the Mobarakeh Steel Complex, some 280 miles (460 kilometers) south of the capital Tehran, and some 40 miles, 65 kilometers, southwest of central Iranian city of Isfahan. President Donald Trump ordered new sanctions on Iran Wednesday targeting Iran's steel, aluminum, copper and iron sectors, which provide foreign currency earnings for the nation's sagging economy. (AP Photo/Vahid Salemi, File)

In this April 2, 2019, photo, a visitor rides a virtual roller coaster ride operated by a robotic arm in a VR theme park in Nanchang, China. One of the largest virtual reality theme parks in the world has opened its doors in southwestern China, sporting 42 rides and exhibits from VR bumper cars to VR shoot-em-ups. It's part of an effort by Beijing to get ordinary people excited about the technology - part of a long-term bet that VR will come into widespread use. (AP Photo/Dake Kang)

FILE - In this April 4, 2013, file photo, a mechanized shovel loads a haul truck with coal at the Spring Creek coal mine near Decker, Mont. A federal judge in Montana says the Trump administration failed to consider the environmental effects of resuming coal sales from federal lands, but stopped short of halting future sales. U.S. District Judge Brian Morris on Friday, April 19, 2019, ordered government attorneys to enter negotiations with states and environmental groups that had sued to stop the lease sales. (AP Photo/Matthew Brown, File)

Pura Castell walks to a government-run butcher shop to buy chicken, after failing to find chicken the previous day in Bauta, Cuba, Friday, April 12, 2019. A neighbor informed her that chicken had arrived at the government store that distributes almost free monthly food rations. (AP Photo/Ramon Espinosa)

FILE - In this Dec. 11, 2018 file photo, then-Secretary of the Interior Ryan Zinke speaks at EPA headquarters in Washington. Zinke has landed a more than $100,000-a-year job with a Nevada gold-mining firm. Zinke confirmed by phone Tuesday, April 16, he has accepted a consulting and board position with U.S. Gold Corp., a company with business before Zinke's former agency, the Interior Department. (AP Photo/Cliff Owen, File)