Commuters brace for chaos as strike shuts London Underground

A commuter at Earls Court underground station stands next to a sign advising passengers of a planned industrial action in London, Britain, July 8, 2015. A strike by staff and drivers on London's underground train network later on Wednesday, which is set to chaos travel misery for millions of commuters, is "unacceptable and unjustified", a spokesman for Prime Minister David Cameron said. [Photo/Agencies]