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Moscow • After being freed from a Russian jail, Ukrainian pilot Nadezhda Savchenko stands to emerge as a wild new force in Ukraine's already volatile politics.

Savchenko's adamant defiance of Russian authorities and the Russian justice system has made her a national icon, a widely revered symbol of courage and perseverance for a nation reeling from an economic meltdown and a devastating war in the east against Russian-backed separatists. The 35-year-old's blunt candor and passionate ways pose a tough challenge to Ukraine's political clans, who have been locked in fierce power battles that go back decades.

The prospects of more political infighting raises new threats to the stability of Ukraine — and would be welcome news for the Kremlin, which is eager to see its neighbor plunge deeper into turmoil.

Savchenko, an ardent nationalist captured by separatists in June 2014 while she acted as an artillery spotter for a volunteer battalion in eastern Ukraine, will likely take an unflinching stance on the war in the east and oppose any compromise with Russia-backed rebels.

She also is likely to become a voice for masses angry with endemic corruption .