FORT HOOD, Texas — An Army reservist tearfully apologized for her role in the Abu Ghraib (search) prison scandal, saying she failed in her duties and took full responsibility for her actions. Spc. Sabrina Harman's (search) voice cracked as she spoke during the hearing, where she was sentenced to six months in prison for mistreating detainees. "As a soldier and military police officer, I failed my duties and failed my mission to protect and defend," said Harman, 27. "I not only let down the people in Iraq, but I let down every single soldier that serves today. "My actions potentially...