As French authorities race to capture two men who they say killed 12 in a brutal attack on a magazine in Paris Wednesday, details emerged overnight about the two suspects, one of whom appears to have been a failed rapper. Cherif Kouachi, 32, was briefly featured in a 2005 French television documentary as an aspiring rap musician who was arrested on terror charges that put him in prison for a year and a half. At the time, Cherif had told a French court that the scandal at Abu Ghraib prison and the influence of a young religious leader convinced him...