Richard Clarke's dramatic statement to the grieving families during the 9/11 Commission hearings touched a raw nerve across America. Not only had our government failed to prevent the 2001 terrorist attacks but it has proven itself, time and again, incapable of handling the majority of our most crucial national-security issues, from Iraq to Katrina and beyond. This is not just a temporary failure of any one administration, Mr. Clarke insists, but rather an endemic problem, the result of a pattern of incompetence that must be understood, confronted, and prevented.

In Your...