RFK Jr. Grilled, Europeans Pledge Troops to Ukraine, DC Sues Trump Admin

This NPR News podcast, "Up First," presents several news stories. It covers the controversy surrounding Health and Human Services Secretary Robert F. Kennedy Jr.'s stance on vaccines and a Senate hearing where he defended his position. The podcast also discusses European countries finalizing security guarantees for Ukraine, including potential troop deployment, and the U.S.'s possible role. Finally, it reports on the Attorney General for the District of Columbia suing the Trump administration over the deployment of the National Guard to the city.