A flawed design in almost all airplanes is putting flight attendants and pilots at risk, and passengers can unknowingly become victims as well. On July 16, 2018, at 3:43 p.m., Flight 1097 ... made an emergency landing. There were sick passengers on board. People were being hospitalized," said an Alaska Airlines flight attendant. We're calling her Jane to ... protect her from feared retaliation. "The crew felt symptoms of nausea. That is what caused the diversion," said Jane. Contaminated air leaked into the cabin on that diverted flight and that it wasn't the first time it had happened. It is what's known in the industry as a "fume event". Workers ... are fearful of speaking out. "Anybody who is trying to communicate about these instances, they have been pulled in by the company and threatened with their jobs," said Jane. The travelling public is, for the most part, unaware that they could be at risk. "[The airlines] have known about it for a long time," said aviation attorney Mike Danko. "We get about five fume events per day in the U.S." Danko says toxic cabin air has been a known concern ... going back 50 years. At extremely high temperatures, all oils used in jet engines give off fumes. "The fumes contain ... neurotoxins. Same stuff that is used in nerve gas," explained Danko. "We have had cases where one pilot was essentially totally incapacitated, and the other pilot although having difficulties managed to land the plane, and that has happened more than a few times, without question," said Danko.