Reports from Boston say the plane was about to head to Chicago but returned to the gate before takeoff after passengers cited concern about two men on the flight who were speaking Arabic.
Several of the people on that flight were marathoners. The two men were removed from the plane.
Fox in Boston reports the men were not sitting together and both were detained at Logan airport after they were taken off the flight.
There were concerns in New York and Philadelphia as well.
A terminal at LaGuardia Airport was evacuated today after a suspicious package was found in a shopping area.
The terminal was shut down for less than 20 minutes when it was discovered the bag was lighting ballast that had wires sticking out.
Another plane was evacuated as soon as it landed Philadelphis after what was called a suspicious bag was found.