Russia is stepping up its support for Cuba by sending a second oil tanker to help the island tackle its worsening energy crisis, which has been exacerbated by a US fuel blockade. Energy Minister Sergei Tsivilev announced this move after a first delivery this week addressed immediate shortages and widespread blackouts. This shift is significant as it underscores Moscow's strategic alignment with Havana amid ongoing US sanctions, potentially reshaping regional energy dynamics and US-Russia relations.