Flying fish to your table

As a way of easing the burden on waiting staff, it is an idea that could certainly get off the ground.
The Yo! Sushi chain of restaurants is trialling a mini helicopter to serve its customers.
The gadget has four rotors and can travel at up to 25 miles an hour -- or more than six times a waiter's usual walking speed.
Known as the iTray, it is controlled with an iPad, which restaurant staff tip in the direction they want the food to travel.
Staff load the tray, fly it to a customer's table up to 50 yards away, and return it when they see the food has been removed.
Currently there are just two of the devices in operation, at the chain's Soho branch in central London.
If it proves popular it could be rolled out to all 64 of Yo! Sushi's UK restaurants next year.
Waitress Gabriella Micu, 28, said: "It's really fun for customers and I hope we can get to the point where we can serve guests from the central kitchen as it would definitely help to cut down the time walking around the restaurant."
The iTray is made from a light-weight carbon fibre frame.
The company claims it has launched the iTray to mark the release of their new burger, which replaces the traditional bun with Japanese toasted rice.
Customer Mark Love, 26, from London, said: "When I ordered the burger I never imagined it would come flying towards me on a tray."
Mike Lewis, YO! Sushi executive chef, said: "We've been training our Soho team for several weeks now to get used to working with our new flying friend."