Sen. William "Mo" Cowan, D-Mass. walks into the Old Senate Chamber on Capitol Hill in Washington, Thursday, Feb. 7, 2013, with Secretary of State John Kerry, to take part in a re-enactm

 

              Sen. William "Mo" Cowan, D-Mass. walks into the Old Senate Chamber on Capitol Hill in Washington, Thursday, Feb. 7, 2013, with Secretary of State John Kerry, to take part in a re-enactm
Sen. William "Mo" Cowan, D-Mass. walks into the Old Senate Chamber on Capitol Hill in Washington, Thursday, Feb. 7, 2013, with Secretary of State John Kerry, to take part in a re-enactment of the swearing-in as a Senator from Vice President Joe Biden . (AP Photo/Kevin Wolf)