Chris Scott was falling towards the ground above Long Island, New York, when he realised that something was wrong.

An experienced skydiving instructor with around 6,000 jumps behind him, this should have just been another day at work. Strapped to Scott’s chest was a tandem jumper named Gary Messina, for whom the jump was an annual birthday tradition.

But when the men reached an altitude of 175ft, the parachute that had been slowing their descent suddenly collapsed. It had most likely been caught by a dust devil, a small unpredictable tornado that is the bane of skydivers, as it forms in the same clear conditions that are perfect for their sport. More