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Iraqi government forces fire a locally made rocket from a position on the southern outskirts of Tikrit, on March 30, 2015, during a military operation to retake the city from Islamic State (IS) group jihadists. Retaking Tikrit, where jihadists have rigged streets and buildings with explosives, will require "major sacrifices" on the part of Iraqi forces, a senior intelligence officer said. AFP PHOTO/AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

Iraqi government forces fire a locally made rocket from a position on the southern outskirts of Tikrit, on March 30, 2015, during a military operation to retake the city from Islamic State (IS) group jihadists. Retaking Tikrit, where jihadists have rigged streets and buildings with explosives, will require "major sacrifices" on the part of Iraqi forces, a senior intelligence officer said.  AFP PHOTO/AHMAD AL-RUBAYE        (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)