
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.
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Major corporate funding for the PBS News Hour is provided by BDO, BNSF, Consumer Cellular, American Cruise Lines, and Raymond James. Funding for the PBS NewsHour Weekend is provided by...

U.S. scientist saw North Korea nuclear program up close
Clip: 2/14/2018 | 7m 45sVideo has Closed Captions
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.
Problems playing video? | Closed Captioning Feedback
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Major corporate funding for the PBS News Hour is provided by BDO, BNSF, Consumer Cellular, American Cruise Lines, and Raymond James. Funding for the PBS NewsHour Weekend is provided by...