Ukrainian President Volodymyr Zelenskyy has warned nations to prepare for the possibility that Russia will use tactical nuclear weapons.
Developing nuclear weapons requires technological and industrial capabilities that Australia simply does not have at the moment. The political will may be lacking, too.
The meeting between US President Donald Trump and North Korean leader Kim Jong-un in Singapore looks like a lost opportunity, writes James Cotton.
If Donald Trump decides to undo the Iran nuclear agreement, it could damage Iran's internal stability and economic recovery as well as US relations with Europe and Russia.
While America's allies Israel and Saudi Arabia stand to lose from the peaceful resolution to the Iranian stand-off, the causes of peace in Syria, Lebanon and Palestine have just been given a boost, writes Anthony Billingsley.