A Pennsylvania inmate has received a 5-year sentence for writing a prison letter in which he threatened to kill President Barack Obama and eat his flesh. Secret Service agents said 33-year-old Gregory Dale Brockman also threatened to kill first lady Michelle Obama and former President George W. Bush. Brockman was sentenced Thursday to five years in prison. He will serve that time after completing his three- to 10-year burglary sentence at the Chester County prison and 5-year federal prison term for threatening Bush in 2008. He pleaded guilty in May to making the threats.