Engineer Rob Bell explores the new inventions - from giant troop carrying gliders to tanks that could operate on water - that made the Normandy invasion possible seventy years ago. Show more
Discover 11,128,835 listings and 279,892 playable programmes from the BBC
Engineer Rob Bell explores the new inventions - from giant troop carrying gliders to tanks that could operate on water - that made the Normandy invasion possible seventy years ago. Show more