Does the World Athletics Championships have a false start problem?

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US athlete Devon Allen has made global headlines this week after being disqualified from the 110m hurdles final at the World Athletics Championship in Eugene, Oregon. He was judged to have left the starting blocks a thousandth of a second too early. On More or Less we crunch the numbers behind false starts in athletics, asking how quick is too quick when it comes to reacting to a starting gun and whether something else might have gone wrong with the measurement system. Presenter: Ben Carter Producer: Jon Bithrey Editor: Richard Vadon Sound Engineer: Rod Farquhar Production Co-ordinator: Brenda Brown (Devon Allen competing at the World Athletics Championships, Oregon22. Credit: Andy Lyons /Getty Images)