Could a hacker *really* bring down a plane from a mobile phone in seat 12C?

A recent document about Air Traffic Control from the US Government Accountability Office has caused quite a stir.

Could a passenger get the plane to do a barrel roll without even turning off the in-flight movie?

Read more: Could a hacker *really* bring down a plane from a mobile phone in seat 12C?

Story added 17. April 2015, content source with full text you can find at link above.