外交危机下，美国丹麦在华盛顿举行高级别会谈

Group 1 - The diplomatic friction between the United States and Denmark has escalated, particularly over the issue of Greenland's sovereignty and Arctic security [1][2] - The U.S. Embassy in Denmark removed flags commemorating Danish soldiers who died in Afghanistan, leading to strong backlash from Danish veterans and the public [1][2] - Danish Prime Minister Frederiksen criticized U.S. President Trump's previous comments about NATO allies' roles in Afghanistan, emphasizing Denmark's significant casualties relative to its population [2] Group 2 - High-level talks between U.S., Danish, and Greenlandic officials are ongoing to address the diplomatic crisis sparked by Trump's threats regarding Greenland [4] - Danish Foreign Minister Rasmussen expressed cautious optimism about the negotiations, which aim to address U.S. security concerns while respecting Denmark's sovereignty [4][5] - Frederiksen reiterated that there is no agreement regarding Greenland that compromises national sovereignty and self-determination, calling for European unity in defense matters [5]