It both does and doesn't exist at the same time. Last week, National Security Adviser Mike Waltz told ABC that "Iran cannot ...

Many scientists say “subcritical” experiments and computer simulations make nuclear weapons testing unnecessary.

British and US nuclear history is irrevocably interwoven. The US and UK cooperated on the Manhattan project, under the 1943 ...

Iran is not seeking a nuclear weapon, despite UN assessments that Tehran has rapidly increased enrichment of uranium to ...

Mearsheimer agreed, noting that in retrospect, there was no strong internal consensus within Ukraine to keep nuclear weapons.

Ukrainian public attitudes about having nuclear weapons have shifted significantly in 30 years. Kyiv may consider setting up ...

Israel's nuclear weapons may have started as a deterrent against another Holocaust, but they have now morphed into an ...

Nuclear pulse propulsion is a technology that would work. It was being developed in the 1960s but it was stopped because of ...

Ayatollah Ali Khamenei, facing pressure from the White House for a new nuclear deal, says any action against Iran will be met ...

The Trump administration should back away from threats and engage Iran in an effort to bring a diplomatic halt to its nuclear ...

According to the International Atomic Energy Agency (IAEA), which carries out inspections of Iranian nuclear sites, Iran has amassed enough fissile material for multiple bombs but has made no ...

North Korean leader Kim Jong-un has no intention of negotiating away his regime's nuclear and other "strategic" weapons ...