http://www.cnn.com/2013/04/11/tech/mobile/phone-hijack-plane/index.html?c=tech
A hacker takes advantage of a phone's communication interface to control a plane's controls. Due to the fact that today's planes have a lack of security, it's easy to use this hack on a live airplane. While it hasn't been used on a plane, simulations have showed that it's possible for this app to work. It's recommended that planes beef up their security before another person with malicious purposes get's their hands on them.