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FILE - This March 9, 2016 file photo shows a bison from Yellowstone National Park being held for shipment to slaughter near Gardiner, Mont. Yellowstone National Park has started shipping hundreds of wild bison to slaughter for disease control as a quarantine facility that could help spare many of the animals sits empty because of a political dispute. Park officials said 15 bison originally slated for the quarantine on the Fort Peck Reservation were instead loaded onto trailers Wednesday, Feb. 8, 2017 and sent to slaughter. Hundreds more will be shipped in coming days. Transferring bison to the quarantine is opposed by Montana officials. (AP Photo/Matthew Brown,File)

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This Feb. 5, 2017 provided by Robert Magnan shows the boundary of a 320-acre animal quarantine on Montana's Fort Peck Reservation that is not being used because of a dispute between the tribes and state livestock officials. Yellowstone National Park has started shipping hundreds of wild bison to slaughter for disease control as a quarantine facility that could help spare many of the animals sits empty because of a political dispute. Park officials said 15 bison originally slated for the quarantine on the Fort Peck Reservation were instead loaded onto trailers Wednesday, Feb. 8 and sent to slaughter. Hundreds more will be shipped in coming days. Transferring bison to the quarantine is opposed by Montana officials. (Robert Magnan via AP)

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New Orleans Firefighter Jared Carter knocks on a door where a dog can be heard barking while conducting a secondary search of homes damaged by a tornado that touched down yesterday in eastern New Orleans, Wednesday, Feb. 8, 2017. Officials say tornadoes that struck in southeastern Louisiana destroyed homes and businesses, flipped vehicles and left thousands without power. (AP Photo/Max Becherer)

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New Orleans Firefighter Jared Carter spray paints a search signal after conducting a secondary search of homes damaged by a tornado that touched down yesterday in eastern New Orleans, Wednesday, Feb. 8, 2017. Officials say tornadoes that struck in southeastern Louisiana destroyed homes and businesses, flipped vehicles and left thousands without power. (AP Photo/Max Becherer)

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New Orleans Firefighter Jared Carter spray paints a search signal after conducting a secondary search of homes damaged by a tornado that touched down yesterday in eastern New Orleans, Wednesday, Feb. 8, 2017. Officials say tornadoes that struck in southeastern Louisiana destroyed homes and businesses, flipped vehicles and left thousands without power. (AP Photo/Max Becherer)

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Linda Forbes walks in a flooded property as she checks on a relative living in the neighborhood Tuesday, Feb. 7, 2017, in Felton, Calif. Flash flood watches are in place for parts of Northern California down through the Central Coast as heavy rains swamp roads and threaten to overtop rivers and creeks. (AP Photo/Marcio Jose Sanchez)

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Paul Peterson, bottom left, surveys his flooded property after the San Lorenzo River overflowed Tuesday, Feb. 7, 2017, in Felton, Calif. Flash flood watches are in place for parts of Northern California down through the Central Coast as heavy rains swamp roads and threaten to overtop rivers and creeks. (AP Photo/Marcio Jose Sanchez)

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Two men walk alongside a flooded street Tuesday, Feb. 7, 2017, in Felton, Calif. Flash flood watches are in place for parts of Northern California down through the Central Coast as heavy rains swamp roads and threaten to overtop rivers and creeks. (AP Photo/Marcio Jose Sanchez)

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The San Lorenzo River floods over Highway 9 north of Santa Cruz, Calif., Tuesday, Feb. 7, 2017. Residents were evacuated as the water rose Tuesday morning when the river flooded Felton Grove and the surrounding neighborhood. (Shmuel Thaler/Santa Cruz Sentinel via AP)

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A home in Sebastopol, Calif., sustained major damage after a large fir tree took off the upper dining and kitchen area, Tuesday, Feb. 7, 2017. (Kent Porter /The Press Democrat via AP)

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A home in Sebastopol, Calf., sustained major damage after a large fir tree took off the upper dining and kitchen area, Tuesday, Feb. 7, 2017. (Kent Porter /The Press Democrat via AP)

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With a flooded neighborhood behind him, Matt Ginder clutches a railing as he tries to make his way through rushing flood waters pouring from the San Lorenzo River at the Felton Covered Bridge in Felton, Calif.,Tuesday morning, Feb. 7, 2017, when the San Lorenzo River flooded Felton Grove and the surrounding neighborhood. (Dan Coyro/Santa Cruz Sentinel via AP)

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The rain-swollen San Lorenzo River flows past the Paradise Park community in Santa Cruz, Calif., Tuesday, Feb. 7, 2017. Residents were evacuated as the water rose Tuesday morning when the river flooded Felton Grove and the surrounding neighborhood. (Shmuel Thaler/Santa Cruz Sentinel via AP)

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Ross Williams reaches his flooded truck in his kayak after leaving his flooded home on Old Covered Bridge Road in Felton, Calif., Tuesday, Feb. 7, 2017, when the San Lorenzo River flooded Felton Grove and the surrounding neighborhood. (Dan Coyro/The Santa Cruz Sentinel via AP)

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Ben Lomond firefighters rescue Rachel Turner and her dogs from their flooded home on Old Covered Bridge Road in Felton, Calif., Tuesday, Feb. 7, 2017, when the San Lorenzo River flooded Felton Grove and the surrounding neighborhood. (Dan Coyro/The Santa Cruz Sentinel via AP)

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In this Tuesday, Feb. 7, 2017 photo, a Chinese woman wearing a mask for protection against air pollution performs an exercise at the Temple of Heaven in Beijing. Beijing has made robust efforts to retire aged vehicles and move heavily polluting industries to outlying provinces, yet the problem persists. The sheer size of the city’s population, now at almost 22 million, and geographic conditions that surround it on three sides with smog-trapping mountains seem to require that further measures are needed. (AP Photo/Andy Wong)

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In this Dec. 22, 2016 photo, Cai Fujian speaks during an interview as he visits the Temple of Heaven with friends in Beijing. When the smog descends over northern China, turning blue skies gray and thickening the air, 65-year-old Cai can feel his lungs tightening. He begins to cough. For weeks at a time, China's smog transforms cities across the industrial north into quiet, gray shells of their normal selves. The Associated Press visited several spots in Beijing in late December during and after a smog "red alert," and used a 360-degree camera to record the difference at each location. (AP Photo/Nomaan Merchant)

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In this Tuesday, Feb. 7, 2017 photo, a couple wearing protection masks visits the Temple of Heaven in Beijing. Beijing has made robust efforts to retire aged vehicles and move heavily polluting industries to outlying provinces, yet the problem persists. The sheer size of the city’s population, now at almost 22 million, and geographic conditions that surround it on three sides with smog-trapping mountains seem to require that further measures are needed. (AP Photo/Andy Wong)

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Wake Forest head coach Danny Manning claps for his team during the second half of an NCAA college basketball game against Notre Dame Tuesday, Feb. 7, 2017, in South Bend, Ind. Notre Dame defeated Wake Forest 88-81.(AP Photo/Robert Franklin)

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Notre Dame head coach Mike Brey yells to his players during the second half of an NCAA college basketball game against Wake Forest, Tuesday, Feb. 7, 2017, in South Bend, Ind. Notre Dame defeated Wake Forest 88-81. (AP Photo/Robert Franklin)