[Police officers patrol at Charles de Gaulle airport, outside of Paris, Thursday, May 19, 2016. An EgyptAir flight from Paris to Cairo with 66 passengers and crew on board crashed into the Mediterranean Sea off the Greek island of Crete early Thursday morning, Egyptian and Greek officials said. (AP Photo/Christophe Ena)]PARIS (AP) — The EgyptAir plane that crashed in the Mediterranean had flown through five airports in the 48 hours before it disappeared off radar screens. As authorities try to determine what went wrong, here's a look at airport security and safety at those five sites: