Delta Airlines sues cybersecurity firm CrowdStrike following summer global I.T. outage

ATLANTA (WABC) -- Delta Airlines is suing the cyber- security firm CrowdStrike after the company experienced global outage in July.

The outage caused mass flight cancellations, disrupted travel plans for more than one million customers and cost the carrier more than $500 million.

In a lawsuit filed Friday, Delta claims CrowdStrike committed a series of international and grossly negligent acts that led to the I.T. outage.

CrowdStrike says Delta's claims are based on misinformation and that the airline is trying to shift blame for its slow recovery after the crash.

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