With the increasing difficulty of overcoming and controlling security problems, the rebuilding of solidarity and security mechanisms has become a significant need today. NATO, on which the transatlantic security architecture is built, is one of the alliances that rebuilds itself in the light of regional and global developments. In the rebuilding of the said Transatlantic Security architecture, adherence to common values, the effects of the distribution of the costs incurred by the members as a result of regional crises on their loyalty to the Alliance, and the ability to adapt to changing combat techniques such as cyber attacks and hybrid tactics play an important role. In the panel to be held within this framework, it is aimed to discuss the diplomatic and operational challenges in the Transatlantic Security architecture as well as the limits, opportunities and priorities in the rebuilding of security and turn the feedback into solution proposals for the decision makers.