New Yorks get mobile phone coverage underground

New Yorkers can use their mobile phones on the subway now as the city's antiquated transport system finally enters the internet age.

A pilot scheme has started at four stations in Manhattan. The plan is to extend cell phone coverage underground to all 277 stations by 2016.

The network, which is more than a century old, carries more than four million passengers around the Big Apple every day.

Laura Trevelyan reports.