North Korea is threatening nuclear strikes against the U.S. and its allies.
There's concern that it may soon be able to "miniaturize" a nuclear bomb onto a missile.
Is this the right time to be talking about reducing the number of nuclear weapons in the world?
Foreign policy analyst C. Raja Mohan - who also has a master's degree in nuclear physics - wrote in an opinion piece for the Indian press that both conservatives and liberals have "whipped themselves into a frenzy" about the dangers of nuclear proliferation.
He argues that a policy of containment would work better than trying to roll back its nuclear program.
Ira Lechner, chairman of the advocacy group Council for a Livable World, says the threats from North Korea only highlight the need to draw down nuclear arsenals - and to collect leftover nuclear material, mainly in the former Soviet Union, which could get into the hands of terrorists.
This segment aired on April 12, 2013.