1.   On the first day, Tibetan monks and other religious leaders will walk the perimeter of a circle that will encompass about nine acres to bless it.

2.   You can often find a tourist warily walking its perimeter.

3.   You walk the perimeter, fenced off now, seeded with new sod.

4.   There were sharpshooters walking the perimeter of the Superdome, and uniformed soldiers all over New Orleans.