1.   It was doubtful whether he could take on mountain tribes.

2.   The Hmong are a Laotian mountain tribe that was allied with the United States during the Vietnam War.

3.   But opponents, including other mountain tribes, some local officials, church leaders and professors, say the dam will have unpredicted secondary effects.

4.   They were held by members of the Manahil mountain tribe north of the oil-rich Wadi Massila area.

5.   Two men were killed and a woman was wounded in a shoot-out between two warring mountain tribes in the northern Philippines, police said Tuesday.