21.   American citizens also have a key role to play.

22.   American citizens here are still awaiting the answer to some riddles, like how they should contact the embassy for help if the telephones do not work.

23.   American citizens receive passes to wear around their necks.

24.   American citizens are subject to the laws and procedures of the country they are visiting, says Nyda Budig, a State Department press officer.

25.   American citizens have not been immune.

26.   American citizens often try to stay as tourists, regularly leaving the country and re-entering in order to have visas renewed in their U.S. passports.

27.   American citizens traveling abroad should contact the nearest U.S. embassy or consulate by telephone or fax for up to date information on security conditions.

28.   Among those whose careers were ended, five days after the president took office last month, are two colonels linked to killings involving American citizens.

29.   An American citizen, he was said to have hoped to obtain Korean citizenship after a court in Los Angeles convicted him of rape, kidnapping and robbery.

30.   An American company, protecting American oil companies and American citizens, uses aircraft with advanced night-vision technology to track guerrilla movements.