The leader of Greece's far-right Golden Dawn party will appear in court today where he is expected to respond to charges of organising a criminal group.
Nikolaos Mihaloliakos was one of six party members arrested over the weekend.
The arrests came amid public anger over the fatal stabbing of anti-fascist rapper Pavlos Fyssas.
The man arrested over the attack told police he was a supporter of the far-right party, though Golden Dawn deny any link.
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Guillier conceded a "severe defeat" defeat to his supporters as the result came in.
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.