So hip-hop is starting to get political again. Witness Killer Mike and Ice Cube's new joint, "Pressure." Though stitching a stream of powerful images together has become a bit derivative in rap these days, I think these two heavyweights can have a pass on this one.

No justice, no peace, indeed. The angst in this track is well-placed--never forget those who've come before, and how far we all have to go.