Just weeks after the crash of Malaysia Airlines Flight 17, Russia appears to be preparing for a major offensive in Ukraine. After a recent build-up of troops, there are now some 20,000 Russian forces gathered along the Ukrainian border. At the same time, Ukrainian forces are on the move and hoping to regain control of a key city. CNN's Nick Paton Walsh was forced to take cover from the fighting as he filed this report for AC360.
Questions or comments? Send an email
Want to know more? Go behind the scenes with