"Exhibit at the first symposium on low pollution power systems development held at the Marriott Motor Inn, Ann Arbor. Vehicles and hardware were assembled at the EPA Ann Arbor Laboratory. Part of the exhibit was held in the motel parking lot. Participants looking over the ESB “Sundancers,” an experimental electric car. Ann Arbor, Michigan, October 1973. (Frank Lodge/National Archives/Records of the Environmental Protection Agency)"