31.   The national tragedy took place six years ago.

32.   The massacre in Littleton, Colo., is a national tragedy.

33.   The quake came just days after another national tragedy.

34.   The president has been pushed to center stage by a national tragedy with global implications.

35.   Their supporters have pleaded for their exoneration, saying that they were made the scapegoats for a national tragedy.

36.   The very nature of television changes in times of national tragedy and grief.

37.   These were the faces of the federal government, revealed in the awful glare of national tragedy.

38.   They are left in the delicate position of needing to raise money without a pitch that may seem inappropriate during a time of national tragedy.

39.   This is our national tragedy.

40.   We seize their family tragedy and make it our national tragedy.