Finally, there are actual trains running on the Expo Light rail line, even if they are just test lines.  Streetsblog reader Gökhan Esirgen, a vocal backer of the Expo Line, was there to immortalize the day.  He also provides the following historical note to accompany his picture:

First Expo Line test train with a fresh paint job that looks brand-new being pulled south toward USC with a high-rail vehicle on Flower St just north of Adams Blvd. Also, seen in the far background on the left is Alan K. Weeks taking pics, who had also captured shots of the last ride of the Air Line (predecessor of the Expo Line) in 1953 when he was 21.