Twitter has joined the likes of Facebook Apple and other tech giants in offering two-factor authentication. Should we call it "the death of the password?" Maybe. Also in tech desctruction, iPhone users have spent billions repairing their damaged and cracked screens since 2007. Repair costs aren't getting any cheaper either. Better protect your screens carefully. Plus, President Barack Obama spoke about drones today. Just how big is the domestic drone industry and will it be a boon or bust for jobs?