This pic is everywhere on the 'Net. But the best commentary with it so far is in an article at The American Thinker by Thomas Lifson.
Sergeant Crowley, the sole class act in this trio, helps the handicapped Professor Gates down the stairs, while Barack Obama, heedless of the infirmities of his friend and fellow victim of self-defined racial profiling, strides ahead on his own. So who is compassionate? And who is so self-involved and arrogant that he is oblivious?