The Duke and Duchess of Cambridge arrived in Glasgow to tour one of the venues for events at the 2014 Commonwealth Games.
The couple visited the Emirates Arena, including the Sir Chris Hoy Velodrome, watching riders in a practice session.
The engagement is part of a two-day tour of Scotland.
More top news
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.