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Water gushes down the Oroville Dam's main spillway Wednesday, Feb. 15, 2017, in Oroville, Calif. The Oroville Reservoir is continuing to drain Wednesday as state water officials scrambled to reduce the lake's level ahead of impending storms. (AP Photo/Marcio Jose Sanchez)

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Water gushes down the Oroville Dam's main spillway Wednesday, Feb. 15, 2017, in Oroville, Calif. The Oroville Reservoir is continuing to drain Wednesday as state water officials scrambled to reduce the lake's level ahead of impending storms. (AP Photo/Marcio Jose Sanchez)

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Graves are submerged in floodwaters in a cemetery downstream from a damaged dam Wednesday, Feb. 15, 2017, in Marysville, Calif. The Oroville Reservoir is continuing to drain Wednesday as state water officials scrambled to reduce the lake's level ahead of impending storms. (AP Photo/Marcio Jose Sanchez)

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Water gushes down the Oroville Dam's main spillway Wednesday, Feb. 15, 2017, in Oroville, Calif. The Oroville Reservoir is continuing to drain Wednesday as state water officials scrambled to reduce the lake's level ahead of impending storms. (AP Photo/Marcio Jose Sanchez)

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Rocks are loaded onto trucks as part of the efforts to repair the Oroville Dam Wednesday, Feb. 15, 2017, in Oroville, Calif. The Oroville Reservoir is continuing to drain Wednesday as state water officials scrambled to reduce the lake's level ahead of impending storms. (AP Photo/Marcio Jose Sanchez)

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Graves are submerged in floodwaters in a cemetery downstream from a damaged dam Wednesday, Feb. 15, 2017, in Marysville, Calif. The Oroville Reservoir is continuing to drain Wednesday as state water officials scrambled to reduce the lake's level ahead of impending storms. (AP Photo/Marcio Jose Sanchez)

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Crews make their way along a road atop the Oroville Dam Wednesday, Feb. 15, 2017, in Oroville, Calif. The Oroville Reservoir is continuing to drain Wednesday as state water officials scrambled to reduce the lake's level ahead of impending storms. (AP Photo/Marcio Jose Sanchez)

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Graves are submerged in floodwaters at a cemetery downstream from a damaged dam Wednesday, Feb. 15, 2017, in Marysville, Calif. The Oroville Reservoir is continuing to drain Wednesday as state water officials scrambled to reduce the lake's level ahead of impending storms. (AP Photo/Marcio Jose Sanchez)

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In this March 27, 2016, file photo, a visitor take pictures of cherry blossom trees in full bloom on the tidal basin in Washington, D.C. (AP Photo/Jose Luis Magana, File)

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FILE - In this June 24, 2013 file photo, fire-promoting beetle-killed trees mix with live trees as a wildfire burns west of Creede, Colo. Foresters say the number of standing dead trees in Colorado is increasing steadily, threatening to make wildfires worse and to degrade vital water supplies that flow from forested mountains. The Colorado State Forest Service said Wednesday, Feb. 15, 2017 that the state has an estimated 834 million standing dead trees, up nearly 30 percent from seven years ago. (AP Photo/Gregory Bull, File)

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The Pentagon has started Phase III on development of its Tactically Exploited Reconnaissance Node (TERN).(YouTube, DARPA)

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In this Tuesday, Feb. 14, 2017 photo, a member of the Syrian Tribes Army, left, that guards the Syrian side of the berm on the north eastern border with Jordan, shakes hands with a Jordanian soldier. The Tribes Army work in coordination with the Jordanian army on security clearance for patients transported from Rukban Camp to the Jordanian territories for treatment. (AP Photo/ Raad Adayleh)

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Benjamin Lopez, 12, walks past his friends room as he helps clean up after a storm destroyed the house Tuesday, Feb. 14, 2017, in Van Vleck, Texas. Tornadoes are suspected of damaging homes and knocking out power southwest of Houston as part of a strong storm system that moved quickly across much of the state. (Michael Ciaglo/Houston Chronicle via AP)

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Diane Woodard looks into her family's home after a storm Tuesday, Feb. 14, 2017, in Van Vleck, Texas. Tornadoes are suspected of damaging homes and knocking out power southwest of Houston as part of a strong storm system that moved quickly across much of the state. (Michael Ciaglo/Houston Chronicle via AP)

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Eurelio Lopez, 8, climbs over the couch in what is left of his home after a storm damaged the home Tuesday, Feb. 14, 2017, in Van Vleck, Texas. Tornadoes are suspected of damaging homes and knocking out power southwest of Houston as part of a strong storm system that moved quickly across much of the state. (Michael Ciaglo/Houston Chronicle via AP)

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Morris Hines looks at a piece of roof that was lodged into a tree after a storm tore through his friends house Tuesday, Feb. 14, 2017, in Van Vleck, Texas. Tornadoes are suspected of damaging homes and knocking out power southwest of Houston as part of a strong storm system that moved quickly across much of the state. (Michael Ciaglo/Houston Chronicle via AP)

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A man walks past piles of debris after a strom ripped through the area Tuesday, Feb. 14, 2017, in Van Vleck, Texas. Tornadoes are suspected of damaging homes and knocking out power southwest of Houston as part of a strong storm system that moved quickly across much of the state. (Michael Ciaglo/Houston Chronicle via AP)

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Harry Hobbs, left, takes a break from cleaning up the remnants of the house he is renting from Kelvin Magnum, right, after a storm ripped it apart Tuesday, Feb. 14, 2017, in Van Vleck, Texas. Tornadoes are suspected of damaging homes and knocking out power southwest of Houston as part of a strong storm system that moved quickly across much of the state. (Michael Ciaglo/Houston Chronicle via AP)

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Faith Rugeley places an American flag in the fence next to her neighbors trailer that was destroyed when a strom came through the area Tuesday, Feb. 14, 2017, in Van Vleck, Texas. Tornadoes are suspected of damaging homes and knocking out power southwest of Houston as part of a strong storm system that moved quickly across much of the state. (Michael Ciaglo/Houston Chronicle via AP)

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Carrie Casey, left, hugs her friend, Sally Farley, after Farley's home was destroyed during a storm Tuesday, Feb. 14, 2017, in Van Vleck, Texas. Tornadoes are suspected of damaging homes and knocking out power southwest of Houston as part of a strong storm system that moved quickly across much of the state. (Michael Ciaglo/Houston Chronicle via AP)