Russia warns of response if West uses depleted uranium ammunition.

Russian President Vladimir Putin has threatened to respond "accordingly" if the UK sends ammunition containing depleted uranium to Ukraine. The UK has pledged to provide Ukraine with armor-piercing rounds for Challenger 2 battle tanks. Putin did not clarify if he was suggesting Russia would turn to its nuclear arsenal in response. Depleted uranium is still considered radioactive, and its use in munitions has been controversial due to its potential health hazards. Russian Defense Minister Sergei Shoigu also ramped up the possibility of a nuclear collision between Russia and the West.