Hacker News on 12 April 2014

• CloudFlare's Heartbleed challenge cracked
• Learn CSS Layout
• Excerpt from ‘Flash Boys’ about Serge Aleynikov and Goldman Sachs
• PyCon US 2014 – Videos
• Bret Victor's favourite books
• Ask HN: Math books like SICP?
• Apple Claims Mogenerator's Methods
• Obama Lets N.S.A. Exploit Some Internet Flaws, Officials Say
• Show HN: Trianglify – low poly style background generator with D3.js
• Experiment: Eliminating Toast Sweat