The Sandhogs of New York - out of sight and underground, the many Irish immigrants who dug as deep under the Big Apple as skyscrapers are high. Few New Yorkers know these tunnel workers exist: out of sight, out of mind. Fewer know how integral Irish workers are to the city's underground network. A documentary on Irish radio station Newstalk digs deep beneath Manhattan with New York's legendary urban miners, The Sandhogs. Subscribe to IrishCentralBarter speaks to 147's retired political director John "Chick" Donohue, business manager Richard T. Fitzsimmons, union president John Ryan, and a host of Irish tunnel workers.