Russia's nuclear rules say it can use atomic weapons if the country — or one of its allies — is attacked, especially if the attacker is a non-nuclear nation backed by a nuclear power. That clause could be seen as applying to Ukraine,

Donald Trump announced that the US will send weapons to Ukraine. The weapons include missiles and air defense systems. NATO supports this move for peace. Russia warned that its nuclear policy is active.

WASHINGTON: US President Donald Trump on Tuesday (Jul 15) warned Russia it has 50 days to agree to a ceasefire in Ukraine or face fresh sanctions, even as the European Union failed to approve its late