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(CNN) - Early speculation about the crash of Malaysia Airlines Flight 17 has centered on the possibility it could have been shot down as it passed over volatile eastern Ukraine.
After all, Ukrainian officials say pro-Russia separatists, or possibly Russia, were behind the shooting down of two Ukrainian aircraft in recent days.
A Ukrainian official also told CNN's Jim Sciutto on Thursday that separatists claimed to have brought down another plane around the same time Flight 17 went missing.