Actress, model, world-class snowboarder and 2014 Paralympic bronze medalist Amy Purdy answers questions at a news conference before the Daytona 500 NASCAR Sprint Cup series auto race at Daytona International Speedway, Sunday, February 22, 2015, in Daytona Beach, Fla. Purdy will be driving the pace car for the race. (Photo by Phelan M. Ebenhack/AP Photo)

Thousands of people were watching the Shoreham Air Show when it turned to horror as a Hawker Hunter plane crashed into a busy bypass, hitting at least four cars – including a wedding limousine.

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Klemens Torggler's door is an invention based on rotating squares, The special construction makes it possible to move the door sideways without the use of tracks. This technical trick opens up new applications for the door.