Hacker News on 4 September 2014

• Twitpic is shutting down
• Show HN: Famous Outfits
• New York Police Officers to Begin Wearing Body Cameras in Pilot Program
• How to zero a buffer
• Standard Markdown Is Now Common Markdown
• Designing a Personal Knowledgebase
• Startup CEOs who gave up fortunes to turn employees into millionaires
• White House Names Google’s Megan Smith the Next CTO of the US
• Why Walking Helps Us Think
• BankAPI