In the past week, 30 Ukrainians have died and more than 163 others injured as Russia escalated its bombing campaign amid U.S. efforts to end the war. It prompted President Trump to lash out at not only Russian President Putin, but also Ukrainian President Zelenskyy. Laura Barrón-López discussed more with retired Army Col. Robert Hamilton of the Foreign Policy Research Institute's Eurasia Program. PBS News is supported by - https://www.pbs.org/newshour/about/funders