Sunday on PBS News Weekend, a new allegation that Reagan’s 1980 campaign worked to sabotage President Carter’s efforts to free American hostages in Iran. A massive belt of seaweed in the Atlantic Ocean is threatening beaches in the U.S., Mexico and Caribbean. Then, how the growing world of #BookTok is driving book sales. Plus, the story of a 20th-century physicist who indelibly changed her field.

WATCH TODAY’S SEGMENTS:
News Wrap: Putin makes unannounced stop in occupied Mariupol
https://youtu.be/-cxrJAXuqZ8
Expert analyzes account of GOP deal in Iran hostage crisis
https://youtu.be/sb3iqtfXsmI
What to know as a giant mass of seaweed is coming to shore
https://youtu.be/IrSL4t7uwyI
#BookTok gives authors and booksellers a much-needed boost
https://youtu.be/uPY0t7wppI0
The career of Chien-Shiung Wu, the ‘First Lady of Physics’
https://youtu.be/2ZMQWSRNxic

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00:00 - Intro
02:05 - News Wrap
04:38 - Secret Revealed
11:14 - Coastal Threat
17:00 - Book Boost
22:27 - Hidden Histories