The style of rigging cradle and rigging wires does not look fit for purpose . I expect they will have a few incidents underground moving heavy object with that style rigging with no visible quality and safety control that you would expect on wire rigging and cradles .The tunnel curtains would also indicate a possible dust issue or could just be there to disguise the rock formation that would give away location of secret underground bases .
The Persians have a long history of tunneling , usually for peaceful purposes like diverting rivers underground . Not really historically surprising that have gone underground . They may be living underground for a very long time if they launch those fireworks .
Who would be the most likely recipient In range of those fireworks ? The Persian diaspora is scattered in many countries would they irradiate their own emigrants ?