Putsch comes to shove: Venezuela

Juan Guaidó, the opposition figure widely viewed as the legitimate leader of Venezuela, has made a dramatic attempt to seize power from President Nicolás Maduro. But the effort appears stalled; how did he go wrong? We look more widely at coups around the world, why they succeed or fail and even how to predict them. And, a dramatic embassy raid reveals why it’s so tough to be a North Korean dissident.