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We take a look at global models for America's proposed high-speed rail system, and then keep it real by dipping into the podcast archive for a piece on Cambodia's Bamboo Railway. We talk about a unique bio-truck that will attempt to go around the world, and hear about the downside of hybrid vehicle technology. We go to Congo to hear about how mining for the materials that make your cell phone work is making life miserable for the locals. And we end with Winston, the high-speed data pigeon.