The US government is urging Apple to unlock a gunman's iPhone, but experts explain why that would create a privacy nightmare for iPhone owners (AAPL)

· Apple's decision not to unlock or create a backdoor into the iPhones used by a gunman in a Florida shooting last month puts the tech giant at odds with the United States government yet again.
· Security experts agree, however, that circumventing the iPhone's security poses a significant risk to iPhone users since it would...