US President Barack Obama signs H.R. 6156, the Russia and Moldova Jackson-Vanik Repeal and Sergei Magnitsky Rule of Law Accountability Act, on December 14, 2012 in the Oval Office of the White House in Washington, DC. The legislation would punish officials tied to the November 2009 death of lawyer and anti-corruption activist Sergei Magnitsky in a Moscow detention centre, denying them entry to the US and freezing their assets. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)