Probe reveals how Tehran imports billions of dollars in weapons components, explosives and trucks through covert procurement channels despite US blockade, Western. Iran has harnessed a military-financial complex of 5,000 agencies to bring in components, explosives and heavy-duty trucks critical to its drone and missile programs. The US has restored its blockade measures against Iran following attacks on ships in the Strait of Hormuz, while also imposing fresh sanctions targeting an Iranian.