核问题谈不拢怎么办？特朗普：将对伊朗进行轰炸，并对其相关产品征税！伊朗最新表态

Group 1 - The core viewpoint of the articles revolves around the escalating tensions between the United States and Iran regarding nuclear negotiations, with President Trump threatening military action if an agreement is not reached [1][4][5] - Trump has indicated a willingness to negotiate with Iran, having sent a letter to Iranian Supreme Leader Khamenei urging discussions on nuclear disarmament [4][5] - Iran's response to Trump's letter suggests a readiness for indirect negotiations, while emphasizing that they will not engage in direct talks under pressure or threats [5] Group 2 - The timeline of events includes Trump's letter sent in early March, which proposed negotiations for a new nuclear agreement, with a two-month deadline for Iran to respond [5] - Iranian officials, including Foreign Minister Zarif, have communicated that Iran's policy is to avoid negotiations under extreme pressure, but they are open to continuing indirect talks [5]