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  1. How an 18th Century Sailing Battleship Works

    How an 18th Century Sailing Battleship Works

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  3. Families of the hostages worry that the Israeli war in Gaza is endangering the hostages.

    Families of the hostages worry that the Israeli war in Gaza is endangering the hostages.

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  4. LIVE: NBC News NOW - June 1

    LIVE: NBC News NOW - June 1

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