And let's head next to eastern Ukraine. It's been a year since separatist fighters and their Russian allies started fighting Ukrainian government troops. A tenuous cease-fire was agreed to in February. Since then, the fighting between the two sides has quieted somewhat. But there's another kind of fighting that's just beginning - anonymous attacks that seem to be part of a terrorist bombing campaign in Ukraine's second-largest city. NPR's Corey Flintoff recently made a reporting trip to that city and filed this report.
COREY FLINTOFF, BYLINE: Kharkiv is a city of nearly 1-and-a-half million people, close to the Russian border. It's a university city with a lot of young people. Many of them turned out for a pro-Ukrainian rally in late February, and they were marching when an explosion tore through the crowd and the...
Also read: Aleppo siege: 'We are crying and afraid'