BOB ABERNETHY: After September 11th, one of the significant reactions was not only worship but interfaith worship. Deryl Davis reports on what many describe as unprecedented interfaith activity.

DERYL DAVIS: They've gathered in stadiums, on college campuses, in churches large and small across America -- people of many faiths coming together to pray and remember. Times of crisis always bring people closer. But some religious leaders say what's happening now is unusual.

CARDINAL THEODORE MCCARRICK, Archdiocese of Washington, D.C: We've had interfaith relationships, we've had interfaith organizations, but the important thing of this moment is that I'm seeing them much more than I did before, we're talking much more than we did before.

DAVID ANDERSON, Editor, Religion News Service: It's the fruits of two decades or more of patient, unheralded interreligious dialogue that's been going on at both the local and national level.

DERYL DAVIS: Religious groups are emphasizing their commonalities rather than their differences. This spirit of unity extends to denominations which have had little to do with one another. Leaders of the conservative Lutheran Church, Missouri Synod and the more liberal Evangelical Lutheran Church in America held a rare joint worship service after the attacks.