"I did exactly what the church asked me--and now, the church is looking at me like, where have you come from...who are you?" says Sister Nancy Sylvester, IHM (Sisters, Servants of the Immaculate Heart of Mary), in Band of Sisters about the remarkable transformation of Catholic nuns in the United States since Vatican II of the 1960s, and the reaction of some members of the church hierarchy who oppose their changes. Perhaps more than any other group, U.S. nuns embraced Vatican II's call to serve where there was the greatest need.