Explainer: How exactly DO you block a shipping strait?

The US began a blockade of all ships entering and exiting Iranian ports this morning - warning that all vessels - regardless of flag could be intercepted or captured Traffic through the Strait has come to a near standstill, analysts estimate that around 800 ships have been stuck in the Gulf since the war began To explain the blockade, Jesse is joined by Jennifer Parker, Jen is a naval expert who served 20 years with the Royal Australian Navy. Her last appointment was as Director of Operations in Bahrain of the Combined Maritime Forces, a 47-nation coalition promoting maritime security in the Middle East and Indian Ocean region