JUST IN: DHS chief Mullin addresses FAA, Microsoft outages

BREAKING: FAA issues national ground stop due to ‘extraordinary circumstances’

BREAKING: DHS chief Mullin speaks about FAA ground stop

Sec. Markwayne Mullin gives update on FAA ground stop

BREAKING: Trump comments on FAA ground stop

WATCH: White House gives update on ground stop

Special Report: New Orleans riverboat sinks after being struck by tanker ship

White House officials brief after FAA declares nationwide ground stop for all aircraft

Bomb discovered at ethanol plant sparks THOUSANDS of evacuations

FAA lifts nationwide ground stop as thousands of flights canceled

Special Report: FAA orders nationwide ground stop after 'telecommunications outage'

Ukraine strikes Russian warship in Gulf of Finland, in first of its kind attack

Harris Faulkner: This has GOT to be the line in the sand

BREAKING: Europe suspends all US-bound flights

BREAKING: Secretary Duffy announces US airspace has REOPENED

NATIONWIDE GROUND STOP: FAA HALTS flights across US

Iran's grip could 'UNRAVEL RAPIDLY' as Trump ramps up pressure