Two days after the attacks at the World Trade Center and the Pentagon, Virginia Sloan realized that if the terrorists wanted to attack American freedoms, they had got somewhere. "I was valet parking for dinner, and I had my hood and trunk and the inside of my car searched," says Sloan, executive director of the Constitution Project, a legal-issues organization in Washington. "Can we as Americans tolerate that? I think not."
Maybe we can. Americans are generally unfriendly to security measures that intrude too much on their privacy. But that was before last week, before they saw the crematoriums in New...