Hacker News on 20 November 2012

• Low-cost Solution to Clearing Afghan Landmines
• US patent chief to software patent critics: "Give it a rest already"
• The last day
• Pickadate.js
• Airport Security Is Killing Us
• Music Theory for Musicians and Normal People
• EU Scolds Visa et al. For Killing WikiLeaks Donations, Initiates Regulation
• Senate bill rewrite lets feds read your e-mail without warrants
• Big News From Mars? Rover Scientists Mum For Now
• Apple Broke My iPhone, and Their Policies Prevent Them from Fixing It