Military jets escorted a Hawaiian Airlines jet back to Portland, Ore., on Wednesday when the flight crew became suspicious of a passenger shortly after takeoff. "The captain made a decision to return the plane to Portland due to a suspicious passenger who made threatening remarks and refused to store his carry-on bags," a TSA spokeswoman said of the incident, while declining to provide further details. A spokesman for the North American Aerospace Defense Command said the decision to scramble two F-15s was made by NORAD, and not the FAA. "Based on the information we had, we decided it was prudent to launch," he said. The disruptive passenger was released after questioning by the FBI, and it was unknown whether federal charges would be filed in the case.