Christine Caine and her husband, Nick, are Christian evangelists and founders of the global anti-trafficking organization known as the A21 Campaign. She has written several books and speaks passionately on the subject of human trafficking. The Caines live in Sydney, Australia.

This half-hour CBS News special aired Dec. 16, 2013.

The Polaris Project, which works to eradicate human trafficking, collected data from 2007 through 2012, from people who contacted it for services or information, and issued this report. Among its findings: 41% of sex trafficking cases and 20% of labor trafficking cases referenced U.S. citizens as victims. The report and its graphics can be downloaded.

Greg Wark is the co-founder of Stop Child Trafficking Now, a countertrafficking organization that has teamed up with retired Navy SEALS to collect evidence against traffickers and to raise awareness about child sex trafficking. The organization works with churches around the country.

Timothy Wadkins is a professor specializing in the history of Christianity and director of the Institute for the Global Study of Religion at Canisius College in Buffalo, N.Y. He is conducting a research project, “The Preferential Option for the Spirit: Pentecostalism and Culture in Modern El Salvador,” through a grant from the University of Southern California’s […]

Daniel Jordan Smith is an associate professor of anthropology and chair of the anthropology department at Brown University in Providence, R.I. He is conducting a research project, “Pentecostalism and AIDS in Nigeria,” through a grant from the University of Southern California’s Pentecostal and Charismatic Research Initiative.

John McCauley is an assistant professor of comparative politics at the University of Maryland. He is conducting a research project, “Pentecostal-Charismatic Christianity and the African Political Landscape,” through a grant from the University of Southern California’s Pentecostal and Charismatic Research Initiative. He specializes in African politics.

Karrie Koesel is an associate professor of political science at the University of Notre Dame. She specializes in Russian and Chinese politics and the intersection between politics and religion.