NASA spacecraft's mission to gather clues about Earth's habitability

President Joe Biden promises more aid for Ukraine but must overcome opposition from Republican hardliners. Automakers risk a wider strike from union workers. Rupert Murdoch steps down as chairman of Fox and News Corp. Go behind the scenes of Reuters' coverage of the Libya floods. Plus, we visit the flea market in L.A. where striking actors and writers look for other ways to pay the rent.

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