US shifts to Naval Blockade strategy, says ceasefire on, no war powers authorization needed from Congress. Naval blockade started on April 13 on its 18th day on May 1. It means Iran's economy is affected by lack of oil revenues to finance the economic needs the longer the blockade goes on, with US goal to remove danger of nuclear materials inside Iran requiring ti to be shipped out to Russia or a third safe country. This is a goal that is supported by all nations that do not want to see nuclear weapons in a dangerously volatile region with 5 decades of wars by 2025.