Two of former President Donald Trump's strongest GOP presidential challengers took shots at each other during the final Republican debate before the Iowa caucuses. Two Republican-led House committees voted to advance a resolution to hold Hunter Biden in contempt of Congress. We'll tell you about a deadly avalanche at a popular ski resort in California. The federal government gave the green light to some companies offering bitcoin exchange-traded funds. Lastly, long-time University of Alabama football head coach Nick Saban is retiring.
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CNN 5 Things