North Korea has sentenced American citizen Kenneth Bae to 15 years' forced labor for unspecified crimes against the regime.Bae, also known as Pae Jun Ho, is accused of attempting to "topple" North Korea, according to state-run media. He has supposedly admitted the charges."The Supreme Court sentenced him to 15 years of compulsory labour for this crime," North Korea's official news agency announced Thursday.Bae, 44, was detained in the northeast city of Rason on Nov.