Russia and Ukraine step up the war on eve of peace talks

The talks, proposed by President Vladimir Putin, have so far yielded the biggest prisoner exchange of the war - but no sense of any consensus on how to halt the fighting.

On the eve of peace talks, Ukraine and Russia sharply ramped up the war with one of the biggest drone battles of their conflict, a Russian highway bridge blown up over a passenger train and an ambitious attack on nuclear-capable bombers deep in Siberia.