Japanese high school students have produced a five-minute virtual reality experience that recreates the sights and sounds of Hiroshima immediately before, during and after the US dropped an atomic bomb on the city 73 years ago.
By transporting users back in time to the moment when a city was turned into a wasteland, the students at Fukuyama, within the Hiroshima prefecture, and their teacher hope to ensure that something similar never happens again.
The August 6 1945 bombing of Hiroshima killed 140,000 people.
Three days later, a second US atomic bomb killed 70,000 people in Nagasaki.
Japan surrendered six days after that, ending the Second World War.