After decades of decline, America's downtowns are once again attracting not just workers and shoppers but residents.

Meet UNLV Michael Pravica. The physics professor will spill on the spill, discussing what went down — rather, what came up — from a physicist’s perspective during the BP oil spill.

The killings of six worshippers at a Sikh temple in Wisconsin has thrust attention on white power music, a thrashing, punk-metal genre that sees the white race under siege.