1.   A highest common factor of our collective conscience.

2.   As the nation searches its collective conscience for solutions or at least explanations for the schoolhouse killings, the quest to understand Harris and Klebold continues.

3.   Almost immediately after the bombs were dropped on Japan, the idea of such a stupendous killing machine swept through our culture, our collective conscience.

4.   But it may take a while before the book closes, if it ever does, on the troubled collective conscience of New York and perhaps elsewhere in America.

5.   But the collective conscience of college sports begins and ends with its ledgers.

6.   In one of its finest moments, the House of Representatives listened to its collective conscience Tuesday night and passed the Shays-Meehan campaign finance reform bill.

7.   Not because Atlanta Braves fans came down with a case of collective conscience.

8.   Now their names and faces are fixed in the collective conscience of Worcester, as objects of anger, or sympathy, or wonder.

9.   These are the images burned in the collective conscience of those who saw the Games, but amid them there are more intimate memories that are just as powerful.

10.   If this U.N. summit helps by raising individual consciousness, as well as by stirring collective conscience, all may not yet be lost.