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Currently, the free-electron laser project produces the most-powerful beam in the world, able to cut through 20 feet of steel per second. If it gets up to its ultimate goal, of generating a megawatt’s worth of laser power, it’ll be able to burn through 2,000 feet of steel per second.
OMG. That is difficult to comprehend. That's more than a 1/3 of a mile of steel in a second. That makes Star Wars seem tame.