The ability of the flight crew to rapidly assimilate exactly what's happening to their aircraft has been a factor in many incidents and accidents. Modern cockpits have many displays. Cameras are tiny and cheap nowadays. Is there a case for fitting external cameras to airliners, looking at the undercarriage, engines and perhaps control surfaces from different angles, with an ergonomic and efficient method of showing the flight crew what's happening outside? Would that be a benefit or a distraction during an emergency?