text:  Live from NPR News in Washington, I'm Janine Herbst. NATO's 75th anniversary summit kicks off in Washington today with leaders from 32 allies gathering here. Terry Schultz reports the Russian attack on a Ukrainian children's hospital will make Kiev's request for help front and center. Helping Ukraine was already going to be the most urgent task at this summit, as NATO Secretary General Jens Stoltenberg described it. He condemned Russia's attack on a children's hospital and pledged even more support to Kiev.