Hours before Vance and Zelenskyy were set to meet, a Russian drone with a high-explosive warhead hit the protective confinement shell of the Chernobyl Nuclear Power Plant in the Kyiv region, the Ukrainian president said. Radiation levels have not increased, Zelenskyy and the U.N. atomic agency said.

Vice President JD Vance hammered home the U.S. demand that the NATO alliance step up defense spending on Friday, ahead of a security meeting in Europe at a time of intense concern and uncertainty over the Trump administration’s foreign policy.