Countries with nuclear weapons

POSTED: 8:53 AM PST February 12, 2013    UPDATED: 7:38 AM PDT April 2, 2013 
Nuclear radioactive sign

North Korea announced Tuesday it was restarting a nuclear reactor that it shut down five years ago, once again raising worries about the country's nuclear weapons program. But how many weapons does North Korea – or any other country, for that matter -- actually have?