[JURIST] Nigerian national Umar Farouk Abdulmutallab [BBC profile; JURIST news archive], accused of attempting to set off an explosive device on a flight last December, was arraigned Thursday in the US District Court for the Eastern District of Michigan [official website; case materials] on two new federal charges. A federal grand jury charged Abdulmutallab Wednesday on two new counts of conspiracy and firearm possession, in addition to the six previous charges [JURIST report] of attempted use of a weapon of…