61.   Police said rescue efforts to retrieve the bodies of the victims were slowed by the difficult terrain.

62.   Rescue workers were still retrieving bodies Saturday because of the difficult terrain.

63.   Samore said the Himalayan mountains heavily favor a defense by Pakistani troops, who have dug in for years and know the difficult terrain.

64.   The Black Hawks were requested by the Pentagon and Colombian government to do drug surveillance and move police in and out of the difficult terrain.

65.   The effort is hindered by the difficult terrain, lack of maps and limited funding.

66.   The guerrillas blocked the convoy when it was passing through a difficult terrain in the remote mountainous state on Saturday.

67.   The guerrillas blocked the convoy when it was passing through difficult terrain in the remote mountainous state on Saturday.

68.   The rescue team leader, Gottfreid Huber, said they could not retrieve three because of difficult terrain.

69.   The rescue team leader, Gottfreid Huber, said they could not retrieve three other bodies because of difficult terrain.

70.   UNHCR officials, however, say they are hampered by security concerns, insufficient trucks and the difficult terrain.