On Thursday, May 19, EgyptAir flight MS804, traveling from Paris to Cairo, crashed into the Mediterranean Sea. All 66 passengers and crew members aboard were killed. Terrorism is suspected.

This is the fifth major airline crash since the beginning of this year, a fact that may cause some people to wonder if flying is as safe as we’ve been taught to believe.

As a criminologist who studies security and safety leadership, I have reviewed how the airline industry measures its safety record and examined four different kinds of threats – airport security, flight safety, regulations violations and cybersecurity – in order to depict a more accurate picture of the risks that face travelers.