By Issy Ronald, CNN
Photo: GIUSEPPE CACACE / AFP
Iran might be outgunned and outspent by the US and Israel but it has one major advantage - its control over the Strait of Hormuz.
By attacking ships navigating the narrow waterway, Iran has effectively shut the route, through which one-fifth of the world's oil supply passes. Now Tehran has also reportedly mined the strait, further deterring ships from attempting passage and marking a new escalation in the war.
Here's what you need to know:
What is Iran doing?
In recent days, Iran has begun laying a few dozen mines in the strait, according to two people familiar with US intelligence on the matter. The mining is not extensive, but Iran still maintains upward of 80 percent to 90 percent of its small boats and minelayers, one source told CNN, contradic
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