Search for Nancy Guthrie and DNA leads

Rescue teams are searching for missing skiers caught in an avalanche near Lake Tahoe amidst a winter storm. After a setback, authorities continue to canvass neighborhoods for clues in the disappearance of Nancy Guthrie. We'll tell you about another set of deadly US strikes on suspected drug-smuggling vessels. The FDA has reversed course and agreed to review a major drugmaker’s flu vaccine. Plus, a software giant says it's on track to invest billions to help low incomes countries gain access to AI.

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