1.   Relations between the United States and China have been rocky lately, marred by disputes over trade, human rights, arms control and Taiwan.

2.   Arab leaders denounced religious extremism Tuesday at the opening session of an Islamic summit marred by disputes among Middle Eastern nations.

3.   Border disputes have marred relations between Yemen and Saudi Arabia, but an agreement was signed in June to seek a solution.

4.   Border disputes have marred generally good relations between Thailand and Burma, which has a military government scorned by many Western countries for its poor human rights record.

5.   But border disputes still mar the relations of some of its member states.

6.   King Hassan II appealed Tuesday for Muslim unity and tolerance toward other religions as he opened an Islamic summit marred by disputes among Arab participants.

7.   Relations between the two rivals, both NATO members, have been marred by disputes over uninhabited islets, territorial waters and airspace in the Aegean.

8.   The dispute long has marred relations between the two nations, preventing the two countries from signing a comprehensive peace treaty ending World War II hostilities.

9.   The development has heightened tension between Greece and Turkey, two NATO allies whose relations have for long been marred by disputes over Cyprus and other issues.

10.   The dispute long has marred relations between Tokyo and Moscow, preventing the sides from signing a comprehensive peace treaty ending World War II hostilities.