The nuclear today

RED:Five "nuclear weapons states" from the NPT (USA, Russia, UK, France, China)

DARK YELLOW:Other known nuclear powers (India, Pakistan, North Korea)

LIGHT YELLOW: States suspected of having possession of, or suspected of being in the process of developing, nuclear weapons (Israel, Iran, Ukraine)

PINK: States which at one point had nuclear weapons and/or nuclear weapons research programs (Argentina, Brazil, Egypt, Germany, Iraq, Japan, Libya, Poland, Romania, South Africa, South Korea, Sweden, Switzerland, Taiwan).