21.   Then his siren sounded for a second or two.

22.   They are often scared, but few bother to go down to the bunkers at night and almost no one reacts when air raid sirens sound during the day.

23.   You always enter the resale clothing shop confident that once you place the pile of once-favorite apparel on the counter, sirens will sound.

24.   Parliament cut short a special session today when air raid sirens sounded again.

25.   Others defy NATO, going about their daily routines while air raid sirens sound.

26.   Powerful detonations were heard late Monday in the northern city of Novi Sad, after air raid sirens sounded alarm across Serbia.

27.   A few minutes before the announcement, air raid sirens sounded again in Belgrade, the Yugoslav capital.

28.   A half-hour later an all-clear siren sounded.

29.   Air raid sirens also sounded late Friday in Kragujevac, Cacak and elsewhere.

30.   Air raid sirens also sounded late Friday in the central cities of Kragujevac, Cacak, Kraljevo and elsewhere.