But the day after American Airlines Flight 5342 collided with a U.S. Army helicopter in Washington, D.C., killing all 67 people onboard, shares of the company were trading just 2.5% lower.

The original PeoplExpress operated from 1981 to 1987 and grew rapidly by offering rock-bottom fares. It was briefly the nation’s fifth largest airline before falling victim to costly overexpansion.

American Airlines has set up a special helpline that friends and family can call at 1 800 679 8215 if you believe you've had friends or family on board the flight.