21.   They jump stiff-legged, which puts more force on the knee and often causes the knee joint to buckle under the stress.

22.   We cannot put force in place every time a president or Congress sees a terrible tragedy of genocide, of starvation, whatever it might be.

23.   President Jiang, head of the Communist Party commission that oversees the military, instructed Gen. Zhang Wannian to put all forces along the Yangtze on alert late Tuesday.

24.   Abkhazia put its forces on alert, and moved them toward the coast.

25.   Abkhazia then put its forces on alert, and moved heavy weapons toward the coastline, Russian news agencies said.

26.   AIS said its forces have been put on a state of alert.

27.   Amid rampant coup rumors, top military and police officials have put their forces on high alert and again pledged their support for Arroyo.

28.   Anti-aircraft forces have been put on alert in this former Soviet republic, said parliament speaker Zurab Zhvaniya.

29.   But Prime Minister Yitzhak Rabin put Israeli forces on alert for a possible Hamas revenge attack, Israeli media said Tuesday.

30.   Defense forces were put on alert and security was tightened around the U.S. and Israeli embassies.