Virgin Atlantic flight forced to land after passenger's backup battery burst into flames

There are few things in this world more panic-inducing than realizing your smartphone battery is about to die in the middle of a long flight. Being left with nothing but an in-flight movie to occupy yourself is a fate worse than just about anything, which is why backup batteries and external chargers have become common carry-on items for many travelers. Unfortunately for passengers aboard a Virgin Atlantic flight from New York's JFK airport to London's Heathrow, one such battery pack blew its to...