A federal grand jury in Detroit today indicted Umar Farouk Abdulmutallab on six charges for allegedly attempting to destroy Northwest flight 253 on Christmas Day. The indictment mirrors a previous criminal complaint against the alleged al Qaeda operative but reveals that the 23-year-old Nigerian used both pentaerythritol (PETN) along with a triacetone triperoxide (TATP) concealed in his underwear. Watch More on the Christmas Day Attempted Bombing on 'World News with Diane Sawyer,' tonight at 6:30 p.m. ET Both PETN and TATP are high explosives. The original criminal complaint had only listed PETN as the explosive but the government says a...