This week on AI: Apple Watch 2 an 's' model, Apple Car roundtable, FBI unlock yields no rewards

By Roger Fingas

Some focus returned to the second-generation Apple Watch and the Apple Car -- two products shrouded in mystery -- but the encryption debate continued to flourish, particularly with news that the FBI has yet to find useful information on the iPhone of dead San Bernardino shooter Syed Farook.

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A roundup of all of our hottest stories this week:

2016 Apple Watch will be internal 's' upgrade, major design changes to wait until 2017, insider saysFacing 'sluggish sales,' Apple said to continue reduced iPhone production through June quarterCodenames for Apple's 'Project Titan' car HQ borrow from Greek mythology: 'Rhea,' 'Athena' & 'Medusa'FBI has yet to find actionable intel from breached San Bernardino iPhone, report saysFBI requests warrant to unlock iPhone 5c connected to California murder investigationApple Car: It's about the experienceFBI reportedly paid 'gray-hat' hackers, not Cellebrite, for zero day exploit in San Bernardino iPhone caseApple investigating major App Store search changes, mulling paid results, report saysApple's website hints 'OS X' to be rebranded as 'MacOS'