11.   Instead, the Chechens opened fire with semiautomatic weapons and rifle-propelled grenades, triggering a gunbattle that persisted until nearly dawn, the official said.

12.   Instead, the Chechens opened fire with semiautomatic weapons and rocket-propelled grenades, triggering a gunbattle that persisted until nearly dawn, the official said.

13.   Scattered clashes persisted until dawn Tuesday between Marseille police and suburban toughs who attacked some lingering English fans.

14.   Scattered clashes persisted until dawn between police and suburban toughs, who attacked some English fans lingering in the streets.

15.   Scattered clashes persisted until dawn between Marseille police and suburban toughs, who attacked some English fans lingering in the streets.

16.   That view persisted until anthrax-tainted letters appeared in the U.S. postal system last month, Toth said.

17.   The survey also showed the executives expect the difficulties to persist until next year.

18.   There is a national shortage of whooping cough vaccine that the CDC said will probably persist until at least midyear.

19.   This condition will persist until after sunset and may spread to coastal sections.

20.   This weather pattern should persists at least until Tuesday.