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  • Oklahoma lawmakers pass nation's strictest abortion bill

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  • Smuggled footage by captured Ukrainian medic shows realities of war

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  • YouTube videos that allegedly taught Buffalo suspect to modify gun are still online 

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Making it rain: Why the controversial practice of cloud seeding is causing a flurry as drought ravages the West

04:45

States in the west are facing a water crisis and for the first time ever the federal government declared a water shortage on the Colorado river. A weather modification called cloud seeding blasts silver iodide into the sky to improve a cloud’s ability to make it rain or snow. The process can increase precipitation two to 12 percent more per storm. NBC News’ Cal Perry reports on the controversial technology.