A security researcher reportedly told authorities he's been able to hack into aircraft computer systems mid-flight through the in-flight entertainment systems.
An FBI agent's court filing says the researcher claims he was even able to cause a plane to move sideways.
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Security and government experts say such cyber threats are real given that airplanes are increasingly connected to the Internet.
Researcher Chris Roberts was questioned at the Syracuse, New York, airport April 15 after suggesting on Twitter while flying from Chicago that he could get the oxygen masks to deploy. The FBI detailed the incident in seeking a search warrant for Roberts' laptop and other electronics.
Roberts declined to comment Monday from his Denver, Colorado, office. Through his attorney, he said his only interest is improving aircraft safety.