11.   This tension persists.

12.   Although Croats and Muslims nominally are federation partners, tensions persist between them.

13.   But tension persisted as the North contested the borderline.

14.   But tensions have persisted.

15.   But tensions persisted and forces loyal to both sides have clashed several times in recent months.

16.   But tensions persisted between the men and forces loyal to both sides have clashed several times in recent months.

17.   But tensions persisted with gunfire at the airport as a plane landed to pick up Indonesian President Suharto.

18.   Cold War tension persists on the Korean peninsula, which is divided by a heavily fortified border since the two Koreas have still not formally signed a peace treaty.

19.   Despite the peace agreement, tension has persisted.

20.   Despite the reported progress, tensions persisted.