By Pavel Polityuk and Natalia Zinets KYIV (Reuters) – President Volodymyr Zelenskiy on Friday did not rule out a full-blown war with Russia but said Ukraine was not a sinking Titanic and accused Washington and media of fuelling panic that weighed on the economy while there were “no tanks in the streets”. He spoke after Russian President Vladimir Putin said the United States and NATO had not addressed the Kremlin’s main security demands in the East-West standoff over Ukraine, but that Moscow was ready to keep talking. Speaking at a news conference for foreign media, Zelenskiy said: “There are n…