51.   Authorities tightened security at federal buildings throughout the city, including the Capitol and the White House.

52.   Because of the continuing federal takeover of security at airports, travelers will face delays and disruptions.

53.   Beijing has also stepped up security at diplomatic compounds, running barbed wire along walls, blocking off streets and adding perimeter fences.

54.   Bermuda-based ADT, meantime, will remain in the cross hairs of others looking to expand into the business of monitoring security at homes and businesses.

55.   Bernd said the district will have extra security at Bowie.

56.   Because the note also predicted that Monday would not pass without more deaths, county officials have stepped up security at schools.

57.   Before that, he was head of security at Wembley Stadium and conference centers in London.

58.   Bonner said that any delay could put security at risk.

59.   Both say the income in foreign currency is their only source of security at a time when their tiny nation could be ready to erupt.

60.   -- Providing military security at the airfields.