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U.S. scientist saw North Korea nuclear program up close

Clip: 2/14/2018 | 7m 45sVideo has Closed Captions

Nuclear Scientist Sig Hecker has seen North Korea’s nuclear program firsthand.

How advanced is North Korea's nuclear weapons program? Just ask the few Western experts who have seen glimpses of the program and its evolution, like nuclear scientist Sig Hecker, who has visited seven times and given eye-opening access to their facilities. Science correspondent Miles O’Brien reports on how experts try to access the North’s capabilities.

02/14/2018

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