WOODBURY - A German security consultant and pilot says that he has developed a smartphone app that could allow users to hack into an airplane's controls mid-flight.

Hugo Teso says that through his app, called PlaneSploit, he was able to take control of some plane operations on a flight simulator.

Teso showed off his app at a security summit in the Netherlands this week, demonstrating his ability to change the speed and altitude of a virtual airplane by sending signals to its flight management system.

Commuters at MacArthur Airport were stunned by his creation.

"With technology expanding at such a rapid pace, one never knows," says William Scatolini, of Springfield, Mass. "You would hope that counter-intelligence is working at the feverish pace to thwart malicious attacks."