>> in the wake of the swissair 111 crash, the airline industry is forced to re-evaluate their procedures for in-flight fires. flammability testing becomes more rigorous. insulation blankets are manufactured from more flame resistant materials. and the certification and maintenance of wiring becomes more stringent. >> swissair 111 was a watershed event in how pilots deal with in-flight smoke and fire conditions. after that, pilots recognized how quickly things could go wrong. >> what makes fire such a lethal threat to aircraft is its ability to start and grow undetected, in some cases the interiors of the plane are at risk. but a fire that starts outside can be just as catastrophic. charles degaulle airport, paris. the concorde, the world's only supersonic passenger jet, speeds down the runway at 175 miles per