21.   But Mr. Glenn properly will embark on his final trip to the last frontier next week because those needs loom large.

22.   Grik also houses the Belum Forest, the last frontier of the Peninsular Malaysia, and the only remaining large tract of forest.

23.   Their border, the last Cold War frontier, is the most heavily guarded in the world.

24.   Vavuniya is the last frontier post of the Sri Lankan government.