70397600 - A train in the Chicago rapid transit system known as the´L´ arrives in a station in the LOOP in Chicago, IL, USA70397598 - Sunrise illuminates the elevated tracks of the Chicago rapid transit system known as the´L´ in Chicago, IL, USA70397597 - Sunrise illuminates a train in the Chicago rapid transit system known as the´L´ in Chicago, IL, USA70397596 - Sunrise illuminates the elevated tracks of the Chicago rapid transit system known as the´L´ in Chicago, IL, USA70397599 - A train in the Chicago rapid transit system known as the´L´ arrives in a station in the LOOP in Chicago, IL, USA