US veteran long-distance swimmer has achieved her dream to swim from Cuba to Florida without a shark cage on her fifth attempt.
Her support team wrote on Twitter that her victory "proves dreams do come true":
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The outage struck Hartfield-Jackson Atlanta International Airport at around 1pm local time, stopping all outgoing flights.
It will be a chilly day for many parts with the highest temperatures, about 10 Celsius (50F) in the far northwest.
The social site has been overhauling many of its policies in recent weeks following repeated criticism over how it handles abusive content.