 with campaign stops across the swing state of Pennsylvania over the weekend. Barbara Sprint, NPR News, Washington. NATO is gearing up to mark its 75th birthday with a summit this week in Washington. But Terry Schultz reports from Brussels the atmosphere appears to be that of concern rather than celebration. More than two years into a war at NATO's borders, Secretary General Jens Stoltenberg says solidifying support for Ukraine is the Washington summit's most urgent task.