11.   The Chirac-Kohl coolness forms part of a growing pattern of strained personal relations among world leaders.

12.   The institute is a world leader in space research.

13.   The media tell it whenever they present international relations as a dramatic encounter between world leaders who personify their countries.

14.   The president and other world leaders are meeting to discuss the environment.

15.   The pursuit of a cease-fire dominated a summit of world leaders in Moscow, meeting to discuss nuclear safety and arms proliferation.

16.   Today the business holds its head high and is a world leader in its specialized fields.

17.   We even honor these great gluttons who have become our world leaders, our socialites, our jet-setters.

18.   We really were world leaders in all respects.

19.   World leaders are meeting in Geneva today to consider the peace plan.

20.   World leaders are meeting to discuss the situation, with peace in the region hanging in the balance.