How to build a bomb with materials in the airport

Sigh, just another reason why normal people have to be bothered by TSA (and taxpayers too).  This article points out that the determined person will get past all this security (and costs ).  So perhaps we should spend the money on intel instead?

http://gizmodo.com/guy-builds-a-bomb-just-with-stuff-you-can-buy-after-air-1465435055?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+gizmodo%2Ffull+%28Gizmodo%29