Iran unveiled its powerful Kheibar Shekan missile during massive night rallies in Tehran as tensions with the United States escalated once again. The missile showcase came shortly after senior Iranian official Mohsen Rezaei warned Washington that Tehran could withdraw from the Nuclear Non-Proliferation Treaty if the U.S. attacks the Strait of Hormuz. Iranian media described the missile as a rapid-launch, solid-fuel system capable of striking regional targets with little warning, fueling fears that fragile ceasefire talks could quickly collapse into another dangerous Middle East confrontation.