black limousine rather than the usual armored presidential car. During his visit, Biden met with Volodymyr Zelenskyy, the president of Ukraine, and Olena Zelenska, the First Lady of Ukraine. The White House stated the visit to an active warzone was unprecedented as the U.S. does not have a military presence in Ukraine, nor a significant diplomatic footprint in Kyiv. The visit was the first in modern history that a US leader has traveled into a war zone not under control of the US military. Air-raid sirens blared in Kyiv while Biden and Zelenskyy were walking outside. The sirens were triggered by a Russian MiG, carrying a hypersonic missile, taking off in Belarus. There were no attacks on Kyiv during the visit. The trip preceded a scheduled visit to Europe, but the White House released a schedule about four hours after Biden entered Ukraine indicating he was still in Washington and was leaving for Europe that night. The visit took place on the day Ukraine remembers the Heavenly Hundred, on the eve of a scheduled major speech by Russian President Vladimir Putin and four days ahead of the 1-year anniversary of the full-scale invasion by Russia. The US government believes that while Biden was in Ukraine, Russia conducted a test of an RS-28 Sarmat ICBM that failed. Russia gave the US advance notice of the test. Biden's trip in Ukraine lasted a total of 24 hours, the majority of which were taken by the long train rides. Oleksandr Kamyshin, the CEO of Ukrainian Railways, said the company named the train "Rail Force One" and apologized for the delays caused to other passengers. After the visit, Biden returned to Poland where he had a meeting with the Bucharest Nine and held a speech in Warsaw. He also condemned Russia's backing away from the New START nuclear arms reduction treaty. Joint press conference with Zelenskyy Biden held a joint press conference with Zelenskyy at Mariinskyi Palace, remarking that "One year later, Kyiv stands. And Ukraine stands. Democracy stands. The Americans stand with you, and the world stands with you." Military aid announcement Biden announced an additional military aid package for Ukraine, worth US$500 million and including ammunition for the HIMARS rocket launcher system. Reactions Domestic reactions Media Luke Harding from The Guardian called the visit "arguably the most consequential made by any US president to a European country since the end of the