You have to: Detroit has no commuter trains, no subway, metro or underground.

I should note that it would have been very easy for me to take the metro, the underground subway to the complex, as there is a station just by the gates of the opera.

Later on, while I waited with hundreds of people to get on the D.C. Metro subway system, a friend and I looked through photos from the day by projecting the camera's images onto a concrete wall.