2nd Annual USA Science & Engineering Festival, April 28th & 29th, Washington, D.C.

If you have some free time this weekend, head over to the 2nd Annual USA Science & Engineering Festival, in Washington, D.C. The best part, besides the super-awesome exhibits? It's free! For details, visit the website at http://www.usasciencefestival.org/. And if you attend? Let us know how what you thought of the Festival.
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