1.   The bulldozers are increasingly ineffectual, as soon as they leave, new shacks spring up like mushrooms.

2.   A bulldozer was at the site, scraping large holes in the dirt, and he was afraid he would be buried alive.

3.   Bulldozers are on the scene.

4.   Bulldozers were everywhere.

5.   Bulldozers are busy tearing up sidewalks, and cranes are delivering glass and steel to the Helen Bonfils Theater Complex.

6.   Bulldozers are likely to begin construction next week.

7.   Bulldozers were parked and ready to go if the fire raged up lower Chapin Mesa.

8.   Bulldozers are poised to roll over the lush, rolling plains where the biggest and most important cavalry battle in American history was fought.

9.   But in this case, bulldozers were useless.

10.   But the bulldozers are fired up and ready to go, for a land developer wants to build a resort dab smack in the middle of the Hohokam ruins.