The moon has begun blocking out the sun's rays on the US West Coast, beginning a much-anticipated solar eclipse.
People in Madras, Oregon, a town in the path of totality, could see a small piece of the sun's disc covered, images broadcast by NASA showed on Monday. 
The moon is passing between the sun and the Earth in a rare event that last occurred in the United States in 1979. 
The total eclipse - when the moon will totally or partly obscure the sun - will start in Oregon at 10:19 am.
NASA says all of North America will be treated to the eclipse, but only a 100-kilometre-wide band will experience the moon totally blocking the sun.
"Anyone within the path of totality can see one of nature's most awe inspiring sights," NASA said on a special eclipse website.
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