You can almost figure it out what the sign behind the one of the Robo Guards says.  It is never seen quite clearly.  It reads “ABSOLUTELY NO ADMITTANCE WITHOUT A PASS”.  I don’t think our hero has one of those.

I loved the panel where Rick looks from the cliff over at to the city.  I drew a larger more detailed version of it for the Rick Hopper comic strip cover.  You can see it HERE.