Robert Oppenheimer's Escape To St John: A Caribbean Castaway's Tale Revealed In New Biopic Robert Oppenheimer, Father of the Atomic Bomb, spent his final days as a Caribbean castaway on St John. Oppenheimer's complex relationship with the atomic bomb haunted him until his last days. Truman's order to build a hydrogen bomb led to Oppenheimer's moral objection and subsequent downfall. Stripped of his security clearance, Oppenheimer sought refuge on the secluded island. St John's simplicity offered a stark contrast to Oppenheimer's privileged Manhattan upbringing. Oppenheimer's escape to St John in 1954 remains a little-known chapter in history. St John, the smallest and least developed of the US Virgin Islands, provided a secluded retreat. Two-thirds of St John remain a protected national park, preserving its natural beauty. No airports or cruise ship docks on St John, preserving its serenity and remote allure.