People hold a Ukrainian flag during a rally against the breakup of the country in Simferopol, Crimea, Ukraine, Thursday, March 9, 2014. As separatists in Crimea kept up pressure for unification with Moscow, Ukraine on Sunday solemnly commemorated the 200th anniversary of the birth of its greatest poet, with the prime minister vowing not to give up "a single centimeter" of Ukrainian territory.(AP Photo/Darko Vojinovic)
