As US bombers and cruise missiles are reportedly positioned for possible strikes on Iran’s nuclear, air and command sites, Tehran is banking on a dense, layered air defence network to deny Washington easy air superiority. From newly fielded Russian S‑400s guarding strategic facilities to indigenous Bavar‑373, Khordad‑15, 9‑Dey and Majid systems backed by sprawling radar and sensor grids, Iran has built overlapping long‑, medium‑ and short‑range shields designed to raise the cost of any air offensive. Watch for details