It may not look like much, but this is the asteroid big enough to flatten London that narrowly missed the Earth tonight. The 150ft-wide space rock came as as close as 17,200 miles to Earth's surface.
The asteroid, given the name of 2012 DA14, has been closely tracked since its discovery by a Spanish observatory a year ago.
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Mr Kim has made two recent visits to China.
The study looked at the development of 422 children over the course of eight years.
The president said they will come into force if China refuses to change its practices.