Three teenagers came up with an innovative way to clean lead-contaminated drinking water in public schools -- an idea so smart it made the finals of NASA's coveted nationwide high-school science competition.
The trio -- the only all-female, all-black group in the finals -- engineered a filter that purifies drinking water in old public-school buildings by detecting impurities such as chlorine, copper, and bromine.
But when NASA opened the contest to online voting, users from 4chan, the image-based online bulletin board, launched a campaign to hack the results, forcing NASA to shut down the voting.