Dr. David Leffler, who has the world’s first Ph.D. in Consciousness-based Defence (IDT), launched Dr. David Leffler’s Invincible Defense Technology News. This online magazine, available by free email subscription, provides updates on how Invincible Defense Technology (IDT) is being accepted world-wide. Includes which countries are invincible, which leaders are accepting IDT, IDT events, new books, media coverage and more. Subscribe. Read online.