51.   In the wake of that accident a parliamentary commission of inquiry called on the authorities to tighten safety on domestic flights.

52.   Indian authorities tightened security for Eid amid intelligence reports that militants may strike at vital installations Monday, a paramilitary official said.

53.   Interest in the Chinese market for television companies is waning as the mainland authorities tighten their grip.

54.   After the verdict, authorities tightened securities at the airports around the country even though no threats had been received.

55.   Authorities have tightened security at three major New York City airports, and a New York newspaper reported Sunday that Islamic terrorists specifically were targetting John F. Kennedy International.

56.   Authorities have already tightened security in schools and hospitals.

57.   Authorities tightened security at entry points to the city and at diplomatic missions throughout the capital, and alerted subsidiaries of foreign companies, particularly those of US firms.

58.   Authorities have tightened security in anticipation of an attack.

59.   Chinese authorities have tightened security in the Muslim-populated Xinjiang border area amid fears separatists and religious extremists were planning trouble, a report said Tuesday.

60.   Colombo International Airport escaped major destruction when a huge car bomb failed to fully activate, police said Tuesday as authorities further tightened security at the complex.