11.   In Knoxville, Tennessee, U.S. President George W. Bush said Monday that Mideast peace will require leadership by both sides.

12.   In Knoxville, Tennessee, Bush said peace will require leadership by both sides.

13.   In Tennessee, President George W. Bush said Mideast peace will require leadership by both sides.

14.   Sometime an issue requires leadership.

15.   The economic slowdown is an example of the emergence of unusual challenges that require transcendental leadership.

16.   These require new leadership.

17.   This requires executive leadership.