"This is why we do the Olympics," tweeted political scientist Ian Bremmer after an iconic moment in Rio. Gymnasts Lee Eun-ju of South Korea and Hong Un-Jong of North Korea posed for a selfie during training, where they were seen chatting happily despite the tension between their nations, the BBC reports. The moment was hailed as a triumph of Olympic spirit, though a few skeptics wondered whether Hong would be punished. CNN reports that this is the first Olympics for the 17-year-old Lee, while Hong, 27, first competed at the 2008 Games in Beijing, where her gold medal in vault was her country's first-ever Olympic gymnastics medal. (This hijab-wearing American athlete made history in Rio on Monday.)