Sheldon H. Jacobson: Are airport perimeter security breaches a problem?

A person breached a security fence at Denver International on May 8, eventually reaching an active runway where he was struck by an airplane that was taking off. This forced the airplane to abort takeoff when one of its engines caught fire, requiring passengers to deplane via the airplane’s emergency slide. With the exception of the person struck by the airplane, there were no fatalities, with 12 passengers sustaining non-life threatening injuries.