When the World Trade Center site remained a search-and-rescue operation rather than a lost cause, I interviewed Craig Garber, a paramedic from Dedham, Mass., while reporting on the many volunteers who rushed to New York to help. As I remember it, Craig was tall, grimey-faced and wearing a yellow hard hat and no respirator. Craig was taking a break from four straight days on "the pile," as the rescuers called Ground Zero.