Ukraine's struggling to pay its gas bill to Moscow - but is ruling out merging its nationalized energy firm with Russia's Gazprom to try and lower costs. Previous disputes left Europe in the cold after transit supplies were cut. As Alexey Yaroshevsky reports, Ukraine's now busy looking for ways to go it alone. RT on Twitter: http://twitter.com/RT_com RT on Facebook: http://www.facebook.com/RTnews