Twitter worth $10B, HBO on Apple TV and Amazon gains Downton Abbey streaming rights...links to start your day with.

Twitter nears a $10 billion valuation. CNN

The Wall Street Journal claims it was attacked by Chinese hackers. NY Times

HBO Go will come to the Apple TV this year. Bloomberg

Amazon gets exclusive online streaming rights to Downton Abbey. The Verge

Path app fined $800,000 for iOS privacy breach. Guardian

NYC’s Grand Central Station turns 100. Mashable

Netflix makes all episodes of its original House of Cards series available. The Verge

The cities where America’s inventions come from. Business Insider