美媒：美乌接近达成安全保障协议 领土问题仍存分歧

Group 1 - The core viewpoint of the article is that the U.S. and Ukraine have made progress in negotiations regarding security guarantees, but there are still disagreements on territorial issues [1][2][4]. - The U.S. and Ukraine are close to reaching a security agreement similar to NATO's Article 5 collective defense clause, with 90% of topics agreed upon, but territorial disputes remain a significant challenge [2][4]. - The U.S. requires Senate approval for any security agreements with Ukraine, and officials have indicated that these security guarantees will not be permanent [2][5]. Group 2 - Ukrainian President Zelensky emphasized that joining NATO is the true guarantee for Ukraine, but due to opposition from the U.S. and some European partners, Ukraine is willing to accept security guarantees similar to NATO's collective defense [3][4]. - The negotiations in Berlin involved discussions on a "peace plan" and economic agenda, with both sides reporting substantial progress [3][4]. - European leaders have committed to providing strong security guarantees and economic recovery support for Ukraine, including the establishment of a multinational force and a legal framework for future military support [5].