Last updated at 15:49
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Big freeze hits parts of north and east US, and Canada

If you think it's getting a bit chilly here in the UK, parts of eastern and northern America are in the grip of a winter storm with temperatures well below freezing.
The city of Chicago in Illinois has been particularly badly hit. So only one thing for it - Pam and her dog, Barney, here are wrapped up warm!
Dog with coat in snow
The bad weather is said be coming from Canada down to the US. The midwestern state of Iowa has had temperatures as low as -30C and it's caused a big problem for lots of drivers.
A man clears snow along a road in Iowa
Snow delayed the start of school and reduced speeds on roads in many states. The extreme cold is coming from the Arctic in the north and is expected to last for about a week.
A man walks on a snow-covered sidewalk in Baltimore, Maryland.
Over on the east coast, New York City hasn't escaped - perhaps this woman should have worn a hat in this snowy weather? Forecasters are warning that strong winds will make everything seem even colder, and are urging people to wrap up warm if they go outside, or risk frostbite.
Woman with a head covered in snow
It's been chilly here in the UK, but temperatures in the US and Canada have fallen well below freezing.
People playing on a the hill in Michigan
Incredibly cold temperatures are hitting northern and eastern parts of the US. This lighthouse sits on the edge of Lake Michigan, on the northern border of the USA.
The incredibly cold temperatures hitting northern and eastern parts of the US as well as Canada are continuing. This lighthouse sits on the edge of Lake Michigan - and it looks freezing!
And it's not just the USA - this is Ottawa in Canada. It's not looking to get much warmer, with forecasters warning temperatures could drop as low as -45C in areas.
And it's not just the USA - this is Ottawa in Canada. It's not looking to get much warmer, with forecasters warning temperatures could drop as low as -45C in areas.
Imagine going running in this! The National Weather Service has warned of "dangerously cold air" across the US - and that people need to wrap up warm to protect against frostbite.
Imagine going running in this! The National Weather Service has warned of "dangerously cold air" across the US - and that people need to wrap up warm to protect against frostbite.