21.   Helicopters patrolled the valley looking for anyone who might have slipped through a coalition dragnet, sneaking out on smuggling routes and on to neighboring Pakistan.

22.   Police helicopters patrolled the skies above the city, which besides ongoing Christmas festivities was otherwise deserted.

23.   Police searched cars for weapons and U.N. helicopters patrolled overhead Tuesday after the fifth fatal attack on a police officer in a month.

24.   Residents said U.S. helicopters patrolled over Kabul throughout the night Sunday, making their first sustained appearance over the capital.

25.   Riot police surrounded the courthouse, the street was lined with armored vans and police helicopters patrolled overhead.

26.   Riot police surrounded the courthouse, the street was lined with armored vans, and police helicopters patrolled.

27.   Soldiers and police guarded polling stations while military helicopters patrolled overhead.

28.   The blast started many fires that sent a plume of black smoke into the sky, where police helicopters were patrolling.

29.   The blast also started several fires that sent black smoke into the sky where police helicopters patrolled.

30.   To make sure no one can go anywhere, armored personnel carriers and Apache helicopters were patrolling the war-scarred city.