Behind closed doors: How neighbors were oblivious to secret poker games and the Mafia who investigators say helped run them

Behind the glass doors of an unassuming building in Manhattan, wedged between aging facades and staring across a shuttered print shop, a shadowy world stirred, coming alive with the flick of cards, the muted clink of glasses and the quiet hum of a dangerous secret.

​ Behind the glass doors of an unassuming building in Manhattan, wedged between aging facades and staring across a shuttered print shop, a shadowy world stirred, coming alive with the flick of cards, the muted clink of glasses and the quiet hum of a dangerous secret. Read More Breaking News, Latest News and Videos | CNN