What are the key developments in the US-Russia peace talks regarding Ukraine, and why are European leaders concerned?

Peace talks between Russia and the US are accelerating, with officials meeting in Saudi Arabia and US General Keith Kellogg conducting three days of meetings with President Zelensky in Kyiv. The talks aim to mediate an end to Russia's war against Ukraine. However, European leaders are expressing concern that the Trump administration may not prioritize Ukraine's best interests in these negotiations. This worry comes as US troops and weaponry continue to serve as a deterrent in Poland and other Eastern European countries, highlighting the complex security dynamics at play in the region.