41.   On Tuesday aides had to whisk Arafat to an underground shelter as they heard Israeli helicopters approaching his headquarters in the West Bank town of Ramallah.

42.   On Tuesday, aides had to whisk Arafat to an underground shelter as they heard Israeli helicopters approaching his headquarters in the West Bank town of Ramallah.

43.   Residents in the area went into underground shelters for protection.

44.   South Korea regularly conducts civil defense exercises during which sirens blare, people run for underground shelter and streets are cleared of all traffic.

45.   Tens of thousands of residents huddled in underground shelters for several hours, but were permitted to return to their daily routine by midday.

46.   Tens of thousands of Israelis hurried into underground shelters.

47.   The Israeli army urgent residents of northern Israel to remain in underground shelters, saying there was a continued danger of rocket attacks.

48.   The region had no civil defense system and no underground shelters, he said.

49.   Then all traffic came to a halt and people rushed to underground shelters.

50.   Thousands of residents huddled in underground shelters for several hours, but were permitted to return to their daily routine by midday.