A bomb fixed to the wing? Don’t pilots do walk around inspections of the plane before they takeoff? You’d think a pilot would see the bomb during the preflight inspection.
Link to the full Wall Street Journal article here:
https://freerepublic.com/focus/f-chat/4205133/posts
There are inspection plates that are removable for Airframe and Powerplant mechanics to access interior space and components, wherein something could be inserted that would remain undetected by a normal pilot walk around before the flight.