Iran fired off its latest rhetorical shot at the US — unveiling a huge billboard in Tehran of President Trump’s face with an image of a choked Strait of Hormuz draped across it. The strait, a vital waterway that is just 21 miles across at its narrowest point, is depicted as stitched shut right between Trump’s nose and upper lip.  The building-sized image, seen Saturday in Tehran, includes only a short blurb of text in Farsi and English: “At the Breaking Point” — and comes as the two countries trade threats about a return to military hostilities. A billboard pictured Saturday in Tehran depicts President Trump with the Strait of Hormuz stitched closed across his mouth. ABEDIN TAHERKENAREH/EPA/Shutterstock The regime in Tehran has long used propaganda to needle the US, even before it began lobbing missiles at Israel and Gulf allies in response to the devastating joint US-Israeli attack on Feb. 28.…