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    FBI says three bodies were found in Mexico after disappearance of American and two Australians

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    02:12
  • 19 receive nation's highest civilian honor

    01:38
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  • Piece by piece, he creates Lego masterpieces

    01:37
  • Hundreds arrested in violent clashes at UCLA

    03:12
  • Biden condemns violent protests on campuses

    02:07
  • Trump defense attacks former lawyer for Stormy Daniels in hush money trial

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Study suggests ‘worldwide’ possibilities for tamoxifen

02:12

Tamoxifen, a powerful drug with uncomfortable side effects, has already been found to cut future cancer risk among women diagnosed with estrogen-positive tumors. But a new study demonstrates cancer risk is even lower for women who take the drug for 10 years. NBC’s Robert Bazell reports.