A teenager is still missing, and officials say it's very unlikely he survived. He was swept over a waterfall in Yosemite National Park.
Monday, dog teams helped in the search for the 19-year-old.
He hasn't been seen since he was swimming in a river at the California park on Saturday afternoon.
He went over the edge of what's called the Nevada Fall.
Swimming in that part of the river is not against the law, but park officials say there are warning signs posted.
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