A technician tests microphones on the stage during a rehearsal for the inaugural ceremonies at the Capitol in Washington Jan 13, 2013. [Photo/Agencies]

US Army Military District of Washington Major General Michael Linnington (C), Commander of the Joint Force Headquarters National Capital Region (JFHQ-NCR), is flanked by actors portraying US President Barack Obama, First Lady Michelle Obama, Vice President Joe Biden and his wife Jill Biden as they arrive to review troops during a dress rehearsal at the US Capitol, in Washington, Jan 13, 2013. [Photo/Agencies]