U.S. bitcoin exchanger who sold on Silk Road gets four years in prison

By Nate Raymond NEW YORK (Reuters) - A Florida plumber who operated an underground bitcoin exchange selling the digital currency to users of the black market website Silk Road was sentenced to four years in prison on Tuesday. Robert Faiella, 55, was sentenced by U.S. District Judge Jed Rakoff in Manhattan after pleading guilty to operating an unlicensed money transmitting business. His sentence came a year after prosecutors unveiled charges against Faiella and his co-defendant, prominent bitcoin