In a bid to avert a war over Ukraine, and with energy security high on the agenda, French President Emmanuel Macron is in Moscow on Monday where he and Russian President Vladimir Putin have kicked off what's expected to be "substantive and quite prolonged" talks, as the Kremlin previewed it. Throughout the past weeks of boiling tensions it's largely been Germany and France leading attempts to pursue robust diplomacy, quite apart from constant sanctions threats and talk of military options out of Washington. Macron said in a weekend interview with…