text:  Live from NPR News in Washington, I'm Korva Coleman. The NATO summit is underway in Washington. The U.S. and its allies say they'll send dozens of air defense systems to Ukraine in coming months. That includes some Patriot systems that Ukraine has pleaded for to ward off Russian missile attacks. Ukrainian President Volodymyr Zelensky says this kind of immediate aid will protect his country. He's urging NATO leaders to take more action and not wait to see who wins the November election in the U.S.