Thunderbirds are Go!

Russian space engineers are working on a strap-on backpack which they say could help a person trapped in burning skyscrapers to glide safely to the ground, nestled inside an inflatable umbrella-shaped shell.

The device is inspired by an inflatable nosecone that was initially designed for a Russian probe to Mars but was never used, and which will be tested in a souped-up form in a missile launch next month.

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