41.   A police helicopter was circling over area.

42.   A military helicopter circled slowly above, while policemen and security guards scrutinized the crowd.

43.   A police helicopter circled overhead and traffic was rerouted around the blue glass tower of the World Trade Center.

44.   A police helicopter circled overhead, the thudding of its rotor blades competing with the sermon of the Rev. Benjamin Olivas.

45.   A police helicopter circles low, its blades stirring up a windstorm in the street.

46.   A helicopter circled overhead.

47.   A Qatari air force helicopter circled overhead at the airport and armed guards patrolled the airport parking lot.

48.   A police helicopter circled above all day.

49.   A police helicopter circled over Circus Maximus, and scores of police lined an ancient Roman bridge spanning the Tiber near the crowd.