Probably the most visually compelling feature of the crane is its graffiti. The first three link photos were taken in the summer of 2005. Prior to this, there were other graffiti photos which are linked below the first three. These were taken circa 1998-9.
Notice the 'Rebel' theme in all of them. Are these the love interests of the graffiti artist or friends perhaps from high school?
Next are photos taken in the summer of 2008. The shovel has been moved. Also visible is the racist 'white power' graffiti. Murtha and Rendell were right.