The Russian transit transshipment case is the first WTO Dispute Settlement Body case to decide the question of whether the national security exception is jurisdictional. Russia argues that some of its transit prohibitions are necessary to protect its vital national security interests and seeks to justify them through Article 21(b)(iii) of GATT 1994. The interpretation and possible application of this national security exception has been the subject of much controversy, focusing on the Panel's jurisdiction over the national security exception and the discretionary scope of the invoking state to take measures. This article will describe how the panel in the Russian Transit case interpreted Article 21(b)(iii), and the different analyses of the national security exception clause in the academic community.