PBS NewsHour

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WASHINGTON — A bill that would block suspected Nazi war criminals from receiving Social Security benefits is heading to President Barack Obama for his signature. By voice vote late Thursday, the Senate gave final congressional approval to a measure...
NASA astrobiologist Chris McKay studies the most extreme parts of Earth to understand how life might survive in other perts of the universe. But he’s also studying another life form living in space: humans. Miles Obrien sat down with McKay...