The document discusses how the Iran-Brazil-Turkey agreement enhances trust in the Non-Proliferation Treaty (NPT) and the international system. It analyzes the concept of trust in international relations and how the NPT relies on trust between nuclear and non-nuclear weapon states. The agreement, where Iran agreed to swap uranium for nuclear research, shows Iran's peaceful intentions and commitment to the NPT. This can help strengthen the original trust in the NPT and international system by fulfilling obligations.