美国有线新闻 CNN 朝韩冬奥会开幕式将举半岛旗共同入场 合组女子冰球队（在线收听）

With the 2018 Winter Olympics just over three weeks away in Pyeongchang, South Korea, more cooperation has been announced between that country and its rival North Korea. But some experts and international leaders are skeptical about the progress being made between the two countries.

We've reported on the high level talks between North and South Korea that suddenly resumed earlier this month. We've reported on the North Korean delegation of athletes, musicians and media that are headed to the South.

And South Korea just announced that its athletes and those from North Korea will march together at the Winter Olympics opening ceremony and that they'll do that under one unified flag. This has happened before in a number of sports events, including the 2006 Winter Olympics. North and South Korea are also planning activities together, cultural events, and a unified women's ice hockey team to compete at this year's games.

But while some observers say this is the most significant improvement in Korean relations in years, North Korea has said it's not going to end its nuclear and missile programs, which the international community considers illegal. A Japanese government official says he believes North Korea is using the talks to buy time so that it can continue its weapons programs. What leaders from around the world are waiting to find out is whether the progress that North and South Korea make before the Olympics continues after the games, or if tensions on the Korean peninsula will worsen on?ce again.