For almost 40 years Ali Abdullah Saleh more or less ran Yemen.  “Dancing on the heads of snakes,” he called it.  Then he got tossed out during the Arab Spring of 2011.  But he never stopped angling for power…first joining the Houthi revolution and then trying to sell it out to the Saudis. Then the Houthis killed him and now everything in perpetually chaotic Yemen is more chaotic than ever.  Maggie Michael of the Associated Press has been covering the story.