This is WEEKEND EDITION from NPR News. I'm Rachel Martin. President Obama leaves tonight for the Netherlands. It's the start of a four-nation trip that includes a meeting with the pope and a visit to Saudi Arabia. But the crisis in Ukraine will hang over his agenda. NPR's Ari Shapiro will be on the trip. He joins us now. Hi, Ari.
ARI SHAPIRO, BYLINE: Hi, Rachel.
MARTIN: Give us a sense of what we expect to happen tomorrow when the president and other world leaders meet at The Hague.