Environment

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Water cascades from the blades of a massive tunneling machine as it breaks through a five-foot wide concrete wall while completing boring for the State Route 99 highway, Tuesday, April 4, 2017, under Seattle. After tunneling more than 9,000 feet and building an outer tunnel wall as it moved forward, the boring machine finished digging what will be a two-mile, double-decker traffic tunnel to replace the Alaskan Way viaduct, damaged in an earthquake in 2001. (AP Photo/Elaine Thompson)

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Debris sits atop bracing that had been holding a five-foot wide concrete wall as the cutter heads of a massive tunneling machine are fully visible as it completes boring for the State Route 99 highway, Tuesday, April 4, 2017, under Seattle. After tunneling more than 9,000 feet and building an outer tunnel wall as it moved forward, the boring machine finished digging what will be a two-mile, double-decker traffic tunnel to replace the Alaskan Way viaduct, damaged in an earthquake in 2001. (AP Photo/Elaine Thompson)

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Utah Transit Authority Board Chair Robert McKinley speaks during a news conference in Salt Lake City, Tuesday, April 4, 2017. Prosecutors have agreed not to file charges against a Utah public transit agency in exchange for cooperation with a federal investigation into possible corruption and misuse of public funds by people connected to the agency, the U.S. Attorney's Office in Utah announced Tuesday. (Trent Nelson/The Salt Lake Tribune via AP)

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Utah Transit Authority CEO and President Jerry Benson speaks during a news conference in Salt Lake City, Tuesday, April 4, 2017. Prosecutors have agreed not to file charges against a Utah public transit agency in exchange for cooperation with a federal investigation into possible corruption and misuse of public funds by people connected to the agency, the U.S. Attorney's Office in Utah announced Tuesday. (Trent Nelson/The Salt Lake Tribune via AP)

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Utah Transit Authority's Robert McKinley and Jerry Benson look on as U.S. Attorney John W. Huber speaks during a news conference in Salt Lake City, Tuesday, April 4, 2017. Prosecutors have agreed not to file charges against a Utah public transit agency in exchange for cooperation with a federal investigation into possible corruption and misuse of public funds by people connected to the agency, the U.S. Attorney's Office in Utah announced Tuesday. (Trent Nelson/The Salt Lake Tribune via AP)

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Utah Transit Authority CEO and President Jerry Benson and Board Chair Robert McKinley take questions during a news conference in Salt Lake City, Tuesday, April 4, 2017. Prosecutors have agreed not to file charges against a Utah public transit agency in exchange for cooperation with a federal investigation into possible corruption and misuse of public funds by people connected to the agency, the U.S. Attorney's Office in Utah announced Tuesday. (Trent Nelson/The Salt Lake Tribune via AP)

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Shannon Holsey, president of the Stockbridge-Munsee tribe, speaks to reporters after giving the annual State of the Tribes address in the Wisconsin state Capitol Tuesday, April 4, 2017, in Madison, Wisc. Holsey, the president of a tribe that plans to withhold nearly $1 million from the state over a casino dispute told Wisconsin lawmakers and officials Tuesday that the state will be stronger if tribal leaders and state leaders are "united as allies." (AP Photo/Cara Lombardo)

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FILE - In this March 17, 2017 file photo, Canyon Mansfield, 14, holds the collar of his dog, Casey, who was killed March 16 by a cyanide-ejecting device placed on public land near his Pocatello, Idaho, home, by federal workers to kill coyotes. Environmental and animal-welfare groups have filed a lawsuit, Tuesday, April 4, 2017, claiming the U.S. government is violating the Endangered Species Act by allowing the use of two predator-killing poisons. (Jordon Beesley/Idaho State Journal via AP, File) /The Idaho State Journal via AP)

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FILE - This Thursday, March 16, 2017, file photo released by the Bannock County Sheriff's Office shows a cyanide device in Pocatello, Idaho, The cyanide device, called M-44, is spring-activated and shoots poison that is meant to kill predators. Environmental and animal-welfare groups have filed a lawsuit, Tuesday, April 4, 2017, claiming the U.S. government is violating the Endangered Species Act by allowing the use of two predator-killing poisons. (Bannock County Sheriff's Office via AP)

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Maryland Gov. Larry Hogan, a Republican, shakes hands with Del. David Fraser-Hidalgo on Tuesday, April 4, 2017 in Annapolis, Maryland, after signing a bill to ban the hydraulic drilling technique known as fracking in the state. Fraser-Hidalgo, a Democrat, sponsored the bill. Maryland is the first state where a legislature has voted to bar the practice that actually has natural gas reserves. (AP Photo/Brian Witte)

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FILE - In this Oct. 22, 2016, file photo, Carolina Hurricanes' Bryan Bickell skates during the first period of an NHL hockey game against Philadelphia Flyers, in Philadelphia. Bickell has rejoined the Hurricanes for the last few games of the regular season, five months after his diagnosis of multiple sclerosis forced a hiatus from the team and raised questions about his future in the sport. Bickell skated with the Hurricanes on Tuesday morning, April 4, 2017, in Minnesota and was slated for the lineup to face the Wild at night. (AP Photo/Chris Szagola, File)

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Media members look on as dust fills a pit below while a massive tunneling machine nears breaking through a five-foot wide concrete wall into the disassembly area for the State Route 99 highway, Tuesday, April 4, 2017, under Seattle. After tunneling more than 9,000 feet and building an outer tunnel wall as it moved forward, the boring machine finished digging what will be a two-mile, double-decker traffic tunnel to replace the Alaskan Way viaduct, damaged in an earthquake in 2001. (AP Photo/Elaine Thompson)

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Water pours from the base and a cloud of water vapor and concrete dust forms as a massive tunneling machine nears breaking through a five-foot wide concrete wall into the disassembly pit for the State Route 99 highway, Tuesday, April 4, 2017, under Seattle. After tunneling more than 9,000 feet and building an outer tunnel wall as it moved forward, the boring machine finished digging what will be a two-mile, double-decker traffic tunnel to replace the Alaskan Way viaduct, damaged in an earthquake in 2001. (AP Photo/Elaine Thompson)

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FILE - In this May 20, 2012, file photo, people view an annular solar eclipse as they look towards the setting sun on the horizon in Phoenix. Destinations are hosting festivals, hotels are selling out and travelers are planning trips for the total solar eclipse that will be visible coast to coast on Aug. 21, 2017. A narrow path of the United States 60 to 70 miles wide from Oregon to South Carolina will experience total darkness, also known as totality. (AP Photo/Ross D. Franklin, File)

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This image made available by NASA in March 2017 shows Pluto illuminated from behind by the sun as the New Horizons spacecraft travels away from it at a distance of about 120,000 miles (200,000 kilometers). On Friday, April 7, 2017, the spacecraft will reach a halfway between Pluto and its next much, much smaller stop, the Kuiper Belt object 2014 MU69. (NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute via AP)

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A transit official directs crowds with a megaphone at Hoboken Terminal in Hoboken, N.J., Tuesday, April 4, 2017. A minor derailment on Monday at Penn Station involving a New Jersey Transit train and other rail issues are causing major problems for New York City metro area commuters. (AP Photo/Seth Wenig)

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A transit official directs crowds with a megaphone at Hoboken Terminal in Hoboken, N.J., Tuesday, April 4, 2017. A minor derailment on Monday at Penn Station involving a New Jersey Transit train and other rail issues are causing major problems for New York City metro area commuters. (AP Photo/Seth Wenig)

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FILE - In this May 11, 2011 file photo, Australia's Queensland Premier Anna Bligh makes a presentation to the Commonwealth Games Federation for the Gold Coast to to host the 2018 Commonwealth Games, at a hotel in Kuala Lumpur, Malaysia. Just days after floods devastated wide areas of Australia’s so-called Sunshine State, the Gold Coast is marking the one-year countdown to the Commonwealth Games. (AP Photo/Mark Baker, File)