The gas flow to Ukraine halted Monday in Russia’s latest move to stun its former ally. Russia’s Gazprom — one of the largest extractors of natural gas headquartered in Moscow — claims Ukraine missed the deadline to pay its delinquent bills and negotiators failed to reach a deal on gas prices. Analysts said that the gas supply to Europe will continue as planned, but this could disrupt “the long-term energy supply to the region if the issue remains unresolved,” USA Today reports. This is one of many disagreements Russia and Ukraine have had over gas lines in the last 20…