** FILE ** Bradley Birkenfeld, a whistle-blower in the tax evasion case against Swiss bank UBS AG, holds a news conference outside the Schuylkill County Federal Correctional Institution in Minersville, Pa., Friday, Jan. 8, 2010, before reporting to the federal prison. (AP Photo/Carolyn Kaster)

Photo by: Carolyn Kaster

** FILE ** Bradley Birkenfeld, a whistle-blower in the tax evasion case against Swiss bank UBS AG, holds a news conference outside the Schuylkill County Federal Correctional Institution in Minersville, Pa., Friday, Jan. 8, 2010, before reporting to the federal prison. (AP Photo/Carolyn Kaster)