Pro-Russian activists attend  a rally outside the regional administration headquarters in the eastern Ukrainian city of Lugansk on April 14, 2014. Ukraine's interim president on April 14 made a dramatic about-face aimed at defusing tensions in the separatist east by backing a national referendum on turning the ex-Soviet republic into a federation with broader regional rights.    AFP PHOTO / DIMITAR DILKOFF        (Photo credit should read DIMITAR DILKOFF/AFP/Getty Images)