Former U.S. President Donald Trump drew swift condemnation Thursday after declaring he had ordered the resumption of U.S. nuclear weapons testing, a move...

The testing is necessary to keep pace with weapons programmes in China and Russia, according to Trump.

The U.S. has not conducted a physical nuclear test since 1992 after President George H.W. Bush entered into a unilateral moratorium on nuclear weapons testing.

The U.S. has followed a ‘voluntary moratorium’ on nuclear weapons testing since 1992