Jonathan D. Sarna is professor of American Jewish history at Brandeis University in Waltham, Mass. He is co-author of Religion and State in the American Jewish Experience and author of American Judaism: A History, which won the Jewish Book Council’s Jewish Book of the Year Award in 2004.

A church run magazine for lay Catholics.

Read a May 17, 2013, article by the Orlando Sentinel about one women’s religious mission trips with youth groups.

A Jesuit national Catholic weekly magazine in the United States.

The Guttmache Institute seeks to advance sexual and reproductive health through research, policy analysis and public education. Contact Rebecca Wind.

See an October 2008 Barna Group survey about mission trips.

Global Awareness Through Experience offers immersion trips to invite individuals to explore solidarity and compassion through giving. It’s based in La Crosse, Wis.

This online encyclopedia is the 1917 version. Journalists should be aware that it contains no updates, such as church reforms made during Vatican II and should not be relied upon for current information.

The United States government’s principal agency for protecting the health of all Americans and providing essential human services.