You have probally all heard about the Air France jet crashing in the Alantic. Reports so far have suggested that lighting was the cause of failure. Now I believe Commericial Air Crafts are struck by lightning at least once a year. Lightning is suppose to pass around the exterior of the plane causing only small distrubance. From what I have read though lightning strikes can cause structural damage and electro-magnetic interference. So the question is how safe are commercial jets against lighting strikes ? How accurate are our models for predicting damage on a plane from lighting strikes ?