Mexican Plane Hijacked by Bolivians

This hijacking was a total disaster. The hijackers didn't achieve anything but being arrested. The plane was only briefly hijacked before the Bolivian hijackers were arrested. Luckily no one was harmed. The reason for the hijacking is claimed to be unknown, but I'm sure someone has to have an idea. The big question is why Bolivians wanted to speak with Mexican President Felipe Calderon.