The 2026 conflict between the US/Israel and Iran was supposedly started to prevent Iran from acquiring a nuclear weapon capability. The nuclear weapon threat could be curtailed through destruction of the related systems (thereby removing the capability) or by causing regime change (thereby removing the intent). This episode is the 2nd episode in a 4-part series on Iran. It considers whether going to war over the nuclear threat is "ethical" or a "Just" cause for war - under the 'Laws of War' or 'Just War Theory'. The 'legal' reasons for going to war are detailed, along with a deep review of Iran's nuclear capabilities. One must also consider that Iran's proxy wars and state-sponsored terrorism are justification for going war, but that is covered in part 3 of this series on Iran. The actual conduct of the war is covered in part 4 of this series.