Here's Your Jetpack

From mental_floss:

Jetpacks have long been a staple of American futurism: we believe that soon, just down the line a bit, we'll be able to strap on a jet-powered backpack and fly to work. But, decade after decade, no jetpacks. At least not at my house. The "Where's My Jetpack?" notion is such a mainstay of futurist thinking that it's the title of a book. But despite not having your own jetpack, various prototypes have been built and actually worked. Let's have a look at the best-known jetpack, which was actually called a "rocket belt."

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