Europe has “maybe six weeks or so” of jet fuel left before it’s forced to start canceling flights, if oil supplies remain blocked by the Iran war — just in time for summer vacation, the head of the International Energy Agency warned on Thursday. IEA Executive Director Fatih Birol described the current situation as “the largest energy crisis we have ever faced” — as he called for the Strait of Hormuz to reopen and allow global oil and gas supplies to flow. “Several European countries may start