1.   A siren of panic began wailing in my skull.

2.   But at mid-morning, air raid sirens began to shriek.

3.   Serb military officers cut short the visit when air-raid sirens began to blare.

4.   Shortly before the broadcast started, German bombers appeared over London and the air raid sirens began their dreaded wail.

5.   Suddenly, sirens began to wail.

6.   The museum visit came to an unexpectedly dramatic finale shortly before closing time when tornado sirens began wailing.

7.   Everyone started to run toward the direction of the supposed bomb attack and ambulance sirens began to wail again as they sped away.

8.   Police sirens began wailing and emergency services congregated outside the supermarket.

9.   Soon, sirens began wailing and students began shouting and calling home to assure worried parents.

10.   When the sirens began, a crowd of ultra-Orthodox Jews assailed a television crew at an intersection, amid a column of drivers standing silently next to their cars.