Over the last two years I have been on an extraordinary journey. As a member of a research team accompanying American University's Chair of Islamic Studies, Akbar Ahmed, I have visited over 75 US cities and 100 mosques for the book Journey into America: The Challenge of Islam, which is published this month by the Brookings Institution Press. During our fieldwork, I learned a great deal about America's Muslim community, the religion they practice, and their various cultures. But what surprised me the most was what I learned about America.