On Sept. 15, 2001, thousands of people gathered to mourn Mychal Judge, O.F.M., the beloved chaplain to the Fire Department of the City of New York. The Church of St. Francis of Assisi on West 31st Street in Manhattan could not hold the massive crowd. So while the funeral Mass was being celebrated, Chris Keenan, O.F.M.—the man who would become Father Judge’s successor—was standing across the street, arm in arm with his neighbors, the firefighters of Ladder 24.