A sudden power outage brought the world's busiest airport to a standstill on Sunday, grounding more than 1,000 flights in Atlanta just days before the start of the Christmas travel rush.

A fan died after falling from the upper deck into the lower-level stands at Turner Field on Saturday night during a game between the Atlanta Braves and New York Yankees.

Police are searching two planes at Atlanta’s main airport after authorities received what they said were credible bomb threats.