Up First briefing: U.S. conducts airstrikes on militants in Iran; 2023 U.S. union wins

This 10.0 mm (0.4 inches) monster snowflake holds the Guinness record for the largest snow crystal. A microscope was used to photograph it in four quadrants, which were later digitally recombined.

President Biden orders retaliatory strikes against militants in Iraq after three U.S. servicemembers were injured. A look at the state of U.S. unions after several big 2023 wins.

(Image credit: Kenneth Libbrecht)

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