New submitter MickeyF71 writes "At the Hack in the Box security conference security expert Evan Booth shares the results of his two year research on the effectiveness of airport security. He demonstrates how easy it is to produce lethal weapons from goods easily bought from the tax-free section at most airports."
Google's translation of the Dutch in that link isn't ideal. For those who prefer English to Dutch, Booth's presentation at CarolinaCon 2013
(YouTube video) may be a better bet.