1.   Much of the opposition to dam breaching is centered along the river from the Tri-Cities in Washington to Lewiston, Idaho.

2.   Both were centered along the border deep below the earth.

3.   I was always fascinated by great cities of the past, centered along trade routes, commercial sea ports.

4.   The drug running is centered along the mountainous border between Afghanistan and Tajikistan.

5.   The fighting was centered along three fronts shared by the two poverty-stricken countries -- Badme, Zalambessa, and Bure.

6.   The latest fighting is centered along a portion of the border that has never been marked.