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  • Jared Wickerham
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    Getty Images
    The gunman accused of killing four people in New York City suspected he had chronic traumatic encephalopathy, or CTE — a degenerative brain disease often associated with football players.
  • Kayla Bartkowski
    /
    Getty Images
    Susan Monarez is the first director of the Centers for Disease Control and Prevention to require Senate confirmation. She's also the first director without a medical degree in more than 70 years.