Twilight falls on the City of David in East Jerusalem, while a film about Jerusalem’s past plays in a set of virtual reality goggles. In it, the kings of Judea are preparing for the Babylonian siege inside an ancient, virtual palace, the ruins of which are today, in the real world, underfoot. As the virtual soldiers close in on the virtual city, a scent fills the air—a real one, an invader from the modern world: marijuana. Then another real sensory experience, the voices of muezzins, rising from the mosques of…