RT by @AJEnglish: The US naval blockade of the Strait of Hormuz takes effect, targeting traffic to and from Iranian ports. Tehran rejects the move and vows to assert sovereignty ov

The US naval blockade of the Strait of Hormuz takes effect, targeting traffic to and from Iranian ports. Tehran rejects the move and vows to assert sovereignty over the strategic waterway. Al Jazeera reports from Tehran and Washington.