Schneier article: Spy cameras won't make us safer

Security expert Bruce Schneier wrote an article for CNN entitled "Spy cameras won't make us safer" that's worth reading. His basic premise is:

Pervasive security cameras don't substantially reduce crime. This fact has been demonstrated repeatedly: in San Francisco, California, public housing; in a New York apartment complex; in Philadelphia, Pennsylvania; in Washington; in study after study in both the U.S. and the U.K. Nor are they instrumental in solving many crimes after the fact.