DSEI (Defence and Security Equipment International) is a biennial defense and security trade fair held in London, United Kingdom. It is one of the largest defense exhibitions in the world, attracting exhibitors, visitors, and delegations from the global defense and security industries. The show showcases the latest technologies, products, and services in the defense and security sectors, including land systems, naval systems, aerospace and aviation, and security and safety. DSEI provides a platform for industry professionals to network, conduct business, and stay informed about the latest developments in the defense and security industries. The event also includes seminars, conferences, and live demonstrations, offering attendees the opportunity to gain insight into industry trends and challenges.