President Obama will today join forces with a group of mothers in demanding "common-sense measures" to protect children from gun violence in the wake of the Newtown massacre.
Mr Obama and Vice President Joe Biden will both appear at the event organised by 'Moms Demand Action for Gun Sense in America' to call on Congress to adopt the new safety laws, the White House said.
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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.