Materials industry

This photo released by VSE42.RU, shows an overturned bus at the Raspadsky open cast, 100 kilometers (63 miles) away from the town of Mezhdurechensk, Kemerovo Region, Russia, Friday, Feb. 8, 2019. The bus overturned, killing several miners, according to emergency officials. (VSE42.RU via AP)

FILE - In this June 12, 2018, file photo, North Korean leader Kim Jong Un, left, and U.S. President Donald Trump shake hands prior to their meeting on Sentosa Island in Singapore. Trump used his biggest stage of the year to announce he will hold his second summit with Kim. Trump announced during his State of the Union address that he intends to meet Kim on Feb. 27-28, 2019 in Vietnam, saying that although much work remains to be done toward peace on the Korean Peninsula, his relationship with Kim is a good one. (AP Photo/Evan Vucci, File)

Robert Biedron addresses the founding convention of his new centre-left party "Wiosna" (Spring), in Warsaw, Poland, Sunday, Feb. 3, 2019.(AP Photo/Czarek Sokolowski)

Friends and relatives hold signs with the names of victims, during a march paying homage to the victims of a mining dam collapse a week ago, in Brumadinho, Brazil, Friday, Feb. 1, 2019. A spokesman for the Minas Gerais Fire Department said after the ceremony that authorities were not calling off the search for bodies although no one had been found alive since Saturday. (AP Photo/Andre Penner)

An aerial view shows a collapsed bridge caused by flooding triggered by a dam collapse near Brumadinho, Brazil, Friday, Jan. 25, 2019. The dam that held back mining waste collapsed, inundating a nearby community in reddish-brown sludge, killing at least seven people and leaving scores of others missing. (Bruno Correia/Nitro via AP)

Friends and relatives attend the burial of Vale SA employee Edgar Carvalho Santos, victim of the collapsed dam in Brumadinho, Brazil, Tuesday, Jan. 29, 2019. Officials said the death toll was expected to grow "exponentially," since no had been rescued alive since Saturday. (AP Photo/Andre Penner)

Firefighters pull a body from the mud days after a dam collapse in Brumadinho, Brazil, Monday, Jan. 28, 2019. Firefighters on Monday carefully moved over treacherous mud, sometimes walking, sometimes crawling, in search of survivors or bodies four days after a dam collapse that buried mine buildings and surrounding neighborhoods with iron ore waste. (AP Photo/Leo Correa)

Firefighters pull a body from the mud days after a dam collapse in Brumadinho, Brazil, Monday, Jan. 28, 2019. Firefighters on Monday carefully moved over treacherous mud, sometimes walking, sometimes crawling, in search of survivors or bodies four days after a dam collapse that buried mine buildings and surrounding neighborhoods with iron ore waste. (AP Photo/Leo Correa)

Emerson dos Santos stands on the debris of her mother's house in Brumadinho, Brazil, Saturday, Jan. 26, 2019. Rescuers in helicopters on Saturday searched for survivors while firefighters dug through mud in a huge area in southeastern Brazil buried by the collapse of a dam holding back mine waste, with at least nine people dead and up to 300 missing. Dos Santos' mother was not in the house and survived the tragedy. (AP Photo/Leo Correa)