Our weekly news round-up: Global fallout from Fukushima declared to be minimal; Families of San Bernadino terror victims are suing Facebook, Twitter and Google; Quantum computing comes of age; Hawking says we have 100 years to leave Earth or risk extinction; NASA offers bounty to anyone who can optimise its code; Google docs hit with phishing scam; Foxtel files to block more pirate sites; AI can copy your voice after a minute training.