Metals and minerals industry

FILE – In this Oct. 29, 2008, file photo, a drilling rig used to extract natural gas from the Marcellus Shale, located on a hill above a pond on John Dunn's farm in the Washington County borough of Houston, Pa. New research suggests drinking water supplies in Pennsylvania have shown resilience in the face of a drilling boom that has turned swaths of countryside into a major production zone for natural gas. (AP Photo/Keith Srakocic, File)

FILE – In this Oct. 29, 2008, file photo, a drilling rig used to extract natural gas from the Marcellus Shale, located on a hill above a pond on John Dunn's farm in the Washington County borough of Houston, Pa. New research suggests drinking water supplies in Pennsylvania have shown resilience in the face of a drilling boom that has turned swaths of countryside into a major production zone for natural gas. (AP Photo/Keith Srakocic, File)

This June 9, 2018, satellite image provide by DigitalGlobe shows the 416 Fire, right, and the Burro Fire, left, northwest of Durango, Colo. (Satellite image ©2018 DigitalGlobe, a Maxar company via AP)

This July 10, 2016 file photo shows millionaire Brexit campaigner Arron Banks in London. The chairman of the British Parliament's media committee says a millionaire backer of the successful campaign to leave the European Union has questions to answer about his contacts with Russian officials. Damian Collins says the Culture, Media and Sport Committee plans to question Arron Banks about a report in the Sunday Times on Sunday, June 10, 2018 that he had undisclosed meetings with Russian officials around the time of the June 2016 referendum on EU membership. (Jonathan Brady/PA via AP, file)

In this May 11, 2018 photo, Sakae Casting Co. President Takashi Suzuki shows samples of his company's casting products in his office in Hachioji, in the outskirts of Tokyo. President Donald Trump’s trade relations with Tokyo are testy, but Idaho gave Suzuki a warm welcome. Suzuki, whose company manufactures aluminum parts used for cooling batteries and semiconductors, first went to Silicon Valley looking for opportunities. But that was where everyone went, making for tough competition. (AP Photo/Yuri Kageyama)

In this May 11, 2018 photo, Sakae Casting Co. President Takashi Suzuki shows samples of his company's casting products in his office in Hachioji, in the outskirts of Tokyo. President Donald Trump’s trade relations with Tokyo are testy, but Idaho gave Suzuki a warm welcome. Suzuki, whose company manufactures aluminum parts used for cooling batteries and semiconductors, first went to Silicon Valley looking for opportunities. But that was where everyone went, making for tough competition. (AP Photo/Yuri Kageyama)

Roger Parrish and Diane Johnson, right, rally outside the Capitol in Phoenix, Wednesday, June 6, 2018. Hundreds of Navajo Generating Station employees, relatives and union and tribal leaders rallied at the state Capitol in Phoenix on Wednesday to request a 90-day pause in steps to close the coal-fueled plant by the end of 2019 as scheduled. (AP Photo/Matt York)

French Finance Minister Bruno Le Maire, left, welcomes US Secretary of Commerce Wilbur Ross prior to their meeting at French Economy Ministry in Paris, France, Thursday, May 31, 2018. U.S. tariffs on European steel and aluminum imports are expected after Trump administration's failure to win concessions from EU. (AP Photo/Francois Mori)