51.   Military investigators now believe a frayed hydraulics line was a key factor in a second Osprey crash in December in which four more Marines died.

52.   No one was injured in the second crash.

53.   The cause of the second crash was never confirmed because the aircraft and pilot were never recovered.

54.   The collision was the second fatal crash involving Americans in Italy in a week.

55.   The Banat Air crash was the second major crash this year of a Romanian airliner.

56.   The panel was created after a second Osprey crash last December killed four more Marines.

57.   The second crash landed nearby.

58.   The United Nations is awaiting guarantees of safe passage before sending a team to the site of the second crash, though its exact location is not known.

59.   There was no information about possible survivors from the second crash.

60.   This is the second plane crash involving Big Island Air within the last year.