Pentagon officials are trying to prepare for all of the ways Iran could retaliate, as President Trump hints at what he might do.

Iran could shut the Strait of Hormuz as a way of hitting back against its enemies, a senior lawmaker said on Thursday, though a second member of parliament said this would only happen if Tehran's vital interests were endangered.

The Iranian government reveals its plan to close the Strait of Hormuz, a crucial waterway responsible for 20 percent of the world's oil consumption.