9 year old sneaks onto plane

Although there is a large number of security measures at airports a 9 year old boy at the Minneapolis/St. Paul was able to sneak onto a Delta airline flight and travel to Las Vegas. The boy is reported to be a runaway from the Minneapolis city district and this is not his first "misadventure." An airline expert says that it shouldn't have been easy for the boy to board the flight. He would have had to pass 3 levels of security, TSA, gate agents, and the flight crew, not to mention that he is also a minor. This is a sign that although airport security has improved since 9/11 their are still "gaping wholes."
http://www.usatoday.com/story/todayinthesky/2013/10/06/9-year-old-boy-sneaks-onto-plane-flies-to-las-vegas/2931361/