In an extraordinary show of unexpected unity, North and South Korea sat side by side Friday night under exploding fireworks that represented peace, not destruction, as the 2018 Winter Olympics opened on a Korean Peninsula riven by generations of anger and suspicion.

The sister of North Korea's leader, Kim Jong Un, shook hands with South Korean President Moon Jae-in - and appeared genuinely pleased - while they watched an elaborate show of light, sound and human performance. Minutes later came a moment stunning in its optics and its implications: the United States, represented by Vice President Mike Pence, sitting a row ahead of Kim's sister and the North's nominal head of state, all watching the games begin _ officials from two nations that many worry are on the brink of nuclear conflict.

With Extraordinary Political Optics, Winter Olympics Begin

After years of frustration, billions of dollars and a nagging national debate about their worth, the opening ceremonies took place before a world watching the moment not only for its athletic significance and global spectacle, but for clues about what the political future of the peninsula could hold. A delegation from North Korea, dressed in identical garb and cheering in careful coordination, watched from an upper deck of the stadium.

With Extraordinary Political Optics, Winter Olympics Begin

Then began the Olympic tradition that takes place at every games - the march of athletes from the world's many nations, girded against a frigid Korean night and temperatures that dipped below freezing with biting winds.

With Extraordinary Political Optics, Winter Olympics Begin

"Athletes from the two Koreas will work together for victory, and that will resonate with and be remembered in the hearts of people around the world as a sign of peace,'' Moon said in a reception ahead of the ceremony, according to his office.

A huge crowd gathered in the freezing Olympics Stadium in this isolated, mountainous corner of South Korea, as performances displayed the sweep of Korean history and culture. Members of a delegation from North Korea, part of an extraordinary Olympics partnership between the two Korean rivals, watched from high in the stadium a performance called ``The Land of Peace'' and as past South Korean athletes paraded a large southern flag.

After a chaotic year of nuclear war threats and nuclear and missile tests from the North, it was a striking visual moment.

There was a palpable excitement in this isolated, rugged mountain town, as one of the poorest, coldest and most disgruntled parts of an otherwise prosperous South Korea kicked off two weeks of winter sports, Olympic spectacle and, just maybe, a bit of inter-Korean reconciliation.

There will be plenty of sporting drama for both die-hard snow and ice junkies and the once-every-four-years enthusiast.

Will the Russians who aren't Russians - the 168 who have been invited as "Olympic Athletes from Russia," competing in neutral uniforms under the Olympic flag - bring home gold? Will Patrick Chan of Canada hit his quad jumps and claim figure skating glory?

Can reigning men's gold medalist Yuzuru Hanyu of Japan overcome injury and defend his title against Chan? Will the past and present star of American skiing, Lindsey Vonn, be surpassed by the likely future of the sport, Mikaela Shiffrin?

But the athletic aspect of these games has been overshadowed in the buildup to the opening ceremony by a frenzied, increasingly momentous fire-hose spray of political developments. The rival Koreas, flirting with war just weeks ago, are suddenly making overtures toward the no-longer-quite-so-absurd notion of cooperation.

The North has sent nearly 500 people to the Pyeongchang Games including officials, athletes, artists and cheerleaders after the Koreas agreed to a series of conciliatory gestures to mark the games. More than 2,900 athletes from 92 countries will compete here, making it the biggest Winter Olympics to date.

"Everybody make some noise!'' two pre-ceremony emcees shouted in English and Korean as spectators streamed into the Olympic Stadium before the ceremony.

North Korean dictator Kim Jong Un's sister, making an unprecedented visit to South Korean soil, will now likely attend the same opening ceremony as U.S. Vice President Mike Pence, who's vowing toughest-ever sanctions on the North. Could they meet? That and other theories have engulfed South Korean media.

Pyeongchang was not supposed to share the spotlight with Pyongyang. This was not supposed to be, as some in Seoul grumble, the "Pyongyang Games," a play on the North Korean capital's phonetic similarity to Pyeongchang.