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    Trump lawyers prepare ahead of hush money trial closing arguments

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  • Hallie Jackson NOW - May 24 | NBC News NOW

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    07:46

Spring-like temperatures likely helped fuel December tornadoes

07:38

While it's too soon to tell exactly what was behind this weekend's tornadoes, recent warm temperatures over land and in the Gulf of Mexico along with a trailing cold front was a formula for disaster. Joshua Johnson talks with Dr. Michael Mann about what may have caused the storms and the impact climate change can have.