31.   The finished aircraft are then flown to Patuxent River Naval Air Station.

32.   The high-altitude aircraft are flown by the U.S. Air Force for the United Nations.

33.   The source said members of an EgyptAir flight crew were interviewed by FBI agents in connection with the crash because they had flown the aircraft recently.

34.   The three pilot groups will have to integrate their all-important seniority lists, which determine which aircraft they fly and where they fly them.

35.   These two airliners are so similar in cockpit instrumentation and flying characteristics that the Federal Aviation Administration lets pilots fly either aircraft under a single flight certificate.

36.   Traditionally, the FAA has required airlines to fly new aircraft for two years before granting such certification.

37.   Traditionally, the FAA has required airlines to fly new aircraft for two years in commercial service before granting such certification.

38.   Under a peace agreement reached last July, neither country may send its forces into the area or fly aircraft over it without the approval of international observers.

39.   United, American, Continental and British Airways already fly the aircraft.

40.   Whoever is flying the aircraft, they are not always used with the greatest proficiency.