Air Canada Plane Makes Dangerous Landing Without A Wheel

Yesterday an Air Canada airplane took off from Montreal headed towards Heathrow airport, except the plane forgot one important piece of cargo.
The wheel.
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Shortly after taking off, one of the wheels snapped off a Boeing 777-300 and fell out of the sky. It was eventually found stuck in a fence a few miles away from P.E.T. Airport. Luckily it didn't land on a highway or on someone's house.
The flight managed to land safely. In fact, the pilot had no idea the plane was even missing a wheel until the workers in London noticed.
According to Daily Mail, one worker claims this could have been fatal.
***Plane in photo is a CRJ-900, no the actual Boeing 777-300 which lost the wheel***