And different traditions stress different - so then there's that. I talked to an African American who says before she goes into an interracial church, she sits in her car and she listens to gospel music to get her fill, and she goes into an interracial church where they don't do gospel music, and she's ready to accept the other sorts of ways of worshipping. So there's that.

I think with President Obama there's going to be a discussion, because he himself is multiracial, because we have for the first time a non-white president. There's going to be talk about what does this mean? What is it? Are we in a new era?

What sort of difficulties would happen when people of different cultures try to come together to worship? Tiny little things such as let's tell jokes with each other.

My mother always told me growing up I had a punchable face. Little did I know she was predicting my television career.

So they actually put it into their mission statement, and they start changing things as a result. They may change how worship works. They may actively recruit folks and try and get them to come and help them to feel comfortable and get them involved in leadership, and there's a variety of ways.

But in the US, when you have two separate cultures, each with its right, each of which has come to exist in this political entity in the last couple hundred years, each feeling like, "I have the right to hold onto my culture," and that's what makes it difficult.

But what we found in the study is that churches are ten times less diverse than the neighborhoods they sit in. So there's something more going on than just reflecting the neighborhood, yeah.