1.   Helicopters prowl the skies in search of the dreaded gridlock.

2.   U.S. Army Kiowa reconnaissance helicopters prowl the frontier.

3.   Helicopters prowled over steep ravines, scattering leaflets urging the fleeing North Koreans to turn themselves in.

4.   Helicopters prowled skies and dogs sniffed through fields near the tense Korean border Wednesday on fears that an agent may have successfully slipped across the border into South Korea.

5.   Israeli helicopters later prowled the area, trying to flush out the gunmen with machinegun fire.

6.   Israeli attack helicopters prowled the area along the river Jordan, which forms the border, trying to flush the attackers out with machinegun fire.

7.   Israeli helicopters later prowled the area, trying to flush out the gunmen with flares and machinegun fire.