At a Tokyo art institute, more than a dozen students held up mirrors to their faces while stretching the sides of their mouths upward, fully immersed in a lesson not in their usual curriculum - a smile class.

Biden was presented with a Chiefs’ jersey with the number 46 on it, in tribute to his tenure as the 46th American president.

South Korea says Russian and Chinese warplanes entered its air defense zone without advance notice. Moscow and Beijing are carrying out joint operations to coincide with an increase in drills by the US and its allies.

Drone footage of Istanbul's Olympic Ataturk Stadium on Wednesday showed preparations are well underway for the Champions League final on June 10. With 11 days to go until the match between Manchester City and Inter Milan, people were seen working in the stadium, Champions League signage had been applied to the stadium's gates and the hospitality tents were already setup.

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The number of wild mountain gorillas, who are at risk from humans, is increasing for the first time in years. This is thanks to the efforts of conservationists like Uganda's first-ever wildlife veterinarian, Gladys Kalema-Zikusoka, who says they are truly gentle giants. There are just over a thousand mountain gorillas left, mostly high in the mountains in Uganda, Rwanda and the Democratic Republic of Congo. Kalema-Zikusoka has also written a book, "Walking with Gorillas", charting her life from young enthusiast to wildlife campaigner.