1.   Both were involved in high-profile incidents last semester that heightened racial tensions on campus.

2.   If the way is clear, run towards the kite and relieve the tension on the single line.

3.   In general terms, the greater the area of the sail, the higher the tension on the line.

4.   The failure of the peace talks has led to increased tension on the streets.

5.   The upshot of all this was to heighten the military tension on the divided peninsula.

6.   In those days, there was a great deal of racial tension on campus.

7.   There was a lot of tension on the wire before it snapped.

8.   ...increased trade and a lessening of tension on the border.

9.   There was racial tension on campus.