Kyiv (AFP) – Russia signaled Friday it may dial back its war aims to focus on eastern Ukraine after failing to break the nation’s resistance in a month of fighting and attacks on civilians, including up to 300 feared killed in the bombing of a theatre. The possible shift came as President Joe Biden visited elite US troops serving with NATO just across the border in Poland and France’s Emmanuel Macron proposed an internationally backed evacuation of civilians trapped in the bombarded city of Mariupol. Russian President Vladimir Putin had ordered the February invasion to destroy Ukraine’s milita…