By Marwa Rashad LONDON (Reuters) – Europe’s plan to get through a winter of difficult Russian gas supply with significant imports of liquefied natural gas (LNG) is at risk, with U.S. supply curtailed by a key plant outage, rising demand in Asia and soaring prices. The region’s commitment to sever dependence on Russian supply due to its war with Ukraine has lead to heavy reliance on LNG imports, mainly from the United States, to meet targets on filling gas storage to 80% by November. Countries are bracing for a potential complete cut-off from Russian gas with contingency measures such as increa…