F-16s Scrambled to Escort Jets After Twitter Bomb Threat

Both passenger jets landed safely, NORAD says.

The fighters escorted both aircraft from a distance behind until they landed.

The two passenger flights were Delta 1156 from Portland and Southwest 2492 from Milwaukee.

"It does happen from time to time as part of our NORAD mission to in collaboration with homeland defense security and law enforcement partner to prevent air strikes against North America and safeguard our sovereign airspace," Schlacter said.

"We'll absolutely be doing everything we can to identify who made the initial threats and track 'em down," Johnson said.