Investigators from the NTSB arrived at Newark Liberty International Airport on Monday after a near catastrophe over the weekend.
United Airlines says a flight that took off from Chicago's O'Hare airport was forced to land in Pittsburgh due to a "potential security concern." Passengers evacuated the plane on slides.
As the price of jet fuel rises, airline CEOs expect airfare to rise as well. Jet fuel prices have doubled since the beginning of the year, and it is the second biggest expense for airlines.
A military helicopter crossed in front of a United Airlines flight as the plane was coming in to land at a California airport, according to the Federal Aviation Administration.
Amid the ongoing Middle East conflict, United Airlines CEO Scott Kirby said that ticket prices will need to go up 20% to help cover the surging cost of jet fuel.