Tensions between the United States and Iran stretch back to the Islamic Revolution in 1979 and the subsequent Iran hostage crisis, which set a tone of mutual hostility and deep distrust. The immediate concerns leading up to the 2026 Iran war included Iran’s nuclear program, its ballistic missiles, its military reach in the Middle East region, and failed attempts to renegotiate a nuclear deal after the collapse of the 2015 Joint Comprehensive Plan of Action (JCPOA) nuclear agreement.
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