Joe Biden will not be at the Ukraine peace summit in Switzerland on 15 and 16 June; instead, vice-president Kamala Harris and national security advisor Jake Sullivan will attend. The decision comes despite Biden’s attendance at France's D-Day anniversary celebrations and a G7 meeting in Italy in the next few days; on 15 June he will be at a Hollywood fundraising event. However, the White House stated that no other national leader had done more to support Ukraine’s sovereignty and peace. Over a hundred countries have promised to attend the summit, but some key states - notably China - have decided not to do so because Russia has not been invited. Volodymyr Zelensky criticised these decisions, and stressed the importance of Biden's presence for influencing other leaders. Meanwhile, Russian dissident Boris Kagarlitsky has been sent back to prison after only two months of freedom for his continuing opposition to the war. See