Facebook's grand scheme to bring Internet access to underserved parts of the world could soon get off the ground, literally, with drones flying high overhead. The social network is in talks to buy Titan Aerospace, a company developing solar-powered, unmanned aircraft that can be used to build a data services network in the air, according to a report in TechCrunch, which cited an unnamed source. It put the value of the deal at $60 million.