Arlington Oddness

On our way to the Rosslyn Metro Station yesterday, after panda hunting, we saw a couple weird things. First, on the Key Bridge, we saw these faces painted on one of the cement squares:

Andrew commented that it looked like the Sliders guy, Jerry O’Connell. Then, after we crossed the bridge, we saw this:

Andrew realized that the face was the same as what we saw on the bridge (plus, there was another face painted on a concrete pillar on the other side of the sidewalk).

Anyone know what this is about??