I'd always nod along when Randi Rhodes would say that it's not if it'll happen, but when. And I, like she, always wondered what the catalyst will be that finally lights the fuse. Back in 2010, the spark that begat the Arab Spring was one of those proverbial straws breaking the camel's back--  a Tunisian fruit vendor set himself on fire to protest his government's treatment of himself and his fellow citizens along with its brazen corruption. Before dawn on Friday, Dec. 17, as [Mohammed] Bouazizi pulled his cart along the narrow, rutted stone road toward the market, two police officers blocked his path and [...]