Dancing is all about motion and interaction. Both are expressed in this photograph I made of a performance at an Argentine Gaucho Ranch outside Buenos Aires. I do not use flash in my photography out of courtesy to the performers and because I want my colors to be as natural as possible. I wanted to incorporate the stage lighting into the picture because that, too, was integral to the performance. I selected 1/40th of a second -- a shutter speed slow enough to blur this particular kind of dancing, but fast enough to offer some detail for context. I included the singer at left who was accompanying the dancers, as well as some members of the audience in the background. Above all, I wanted to express the flow of the dance, and the way the dancers worked with each other. I took many photographs of this dance, but this was the moment that said everything I wanted to say about it.