11.   It was not clear why the three men were trying to cross the border, but the rugged frontier is often used by drug smugglers coming from Afghanistan.

12.   Israel would draw a border and seal off the resultant hundreds of miles of rugged frontier with minefields, electronic fences, patrols or other means.

13.   It was not clear why the men were trying to cross the border, but the rugged frontier is often used by drug smugglers coming from Afghanistan.

14.   Moscow has thousands of border troops helping guard the rugged frontier.

15.   Moscow has thousands of border troops helping guard the rugged frontier, which also is a transit point for drug smugglers.

16.   On Thursday, Indonesian troops freed eleven hostages, all of them Indonesians, as the rebels moved toward the rugged frontier with Papua New Guinea.

17.   On Thursday, Indonesian troops freed eleven Indonesian hostages, as the rebels moved toward the rugged frontier with Papua New Guinea.

18.   Russian troops and Tajik rebels based in Afghanistan clash frequently along the rugged frontier.

19.   The dry-season offensives usually end with a new wave of refugees fleeing across the rugged frontier into Thailand.

20.   The hostages were apparently being taken across the rugged frontier towards Papua New Guinea, in the eastern part of the island of New Guinea.