Russia warns of retaliation against West over Ukraine

Russia threatened to retaliate against the U.S. and other Western nations if they provide more powerful weapons to Ukraine, warning on Sunday that stepped-up military aid from allies would trigger a "global catastrophe." Supporters of Ukraine made new pledges worth billions of dollars in armored vehicles, air defense systems and other arms to the embattled European nation late last week, although their promises stopped short of sending German-made battle tanks that Kyiv specifically requested. Advertisement "Supplies of offensive weapons to the Kyiv regime would lead to a global catastrophe," said State Duma Chairman Vyacheslav Volodin, the speaker of Russia's parliament….