Atlanta airport loses power, trapping travelers in planes and terminals nbcnews.to/2yREYZW ATLANTA — A huge power outage brought the world's busiest airport to a standstill over the weekend, ruining holiday travel for thousands with hundreds of flights on Monday already canceled. Hartsfield-Jackson International Airport in Atlanta lost power shortly after 1 p.m. ET on Sunday, leaving passengers trapped inside airport terminals and some in planes on the tarmac for hours. By late Sunday, the airport had canceled 1,173 flights and delayed 207, according to FlightAware.com . Delta Air Lines, which is headquartered in Atlanta, said it was canceling another 300 flights, mostly to Atlanta, on Monday. Facebook Twitter Embed Atlanta airport loses power, trapping travelers in planes and terminals 1:20 Atlanta Mayor Kasim Reed said a fire at the main substation powering the airport triggered the outage, which caused the Federal Aviation Admini...