51.   Adding to the ghostly effect, heavy fogs often enshroud the ruins of the town and the wasteland surrounding it.

52.   An Army official, speaking on the condition of anonymity, said that heavy fog and bad weather were the probable cause of the crash.

53.   Another small plane crashed in heavy fog Friday night near San Dimas, Calif., at the edge of the Angeles National Forest.

54.   At Piacenza, heavy fog limited visiblity and the two lowly clubs seemed content to share the draw.

55.   As dawn broke, heavy fog continued to shroud the ocean.

56.   At the time of the Taipei crash, there was heavy fog around the airport and it was raining lightly.

57.   Authorities have not determined the cause of the crash, although they suspect that heavy fog might have been a factor.

58.   But a heavy fog rolled in, obscuring the shore, and the pair became trapped on a sandbar.

59.   Continued heavy fog hampered initial recovery efforts Thursday in the Barskaun Pass area where the crash occurred.

60.   Despite heavy fog, the cargo plane touched down at Beslan airport, near the city of Vladikavkaz early Sunday.