This study examines the evolving securitization of Unidentified Anomalous Phenomena (UAPs) in the United States (U.S.), utilizing the Copenhagen School’s theory to illustrate a significant shift in the Pentagon’s discourse, moving from outright dismissal to a nuanced acknowledgment of UAPs. By engaging with and expanding upon the UFO taboo discussions, this research sheds light on the contemporary debates on the role of materiality in securitization processes. The paper argues that the complexity of UAP securitization necessitates a multidisciplinary approach that integrates security, scientific inquiry, and global cooperation which will consequently provide a multidimensional understanding of UAPs within national and international security frameworks.