Real-life invisibility cloak shows the promise of "nanomanufacturing"

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This week, the media reported on scientists developing materials they say could create a kind of invisibility cloak. The research was funded in part by the National Science Foundation. It’s just one example of “nanomanufacturing,” which the NSF sees as a way to give the United States an edge as industrial manufacturing wanes.Guest: Bruce Kramer, senior advisor for engineering at the National Science Foundation