First Use — what a limited nuclear war would look like

First Use is a free, browser-based nuclear-escalation simulator. It plays out a limited, hypothetical Israel–Iran nuclear exchange in real time on a living 3D map of Earth: an Iranian first-use strike on Tel Aviv and Nevatim, an Israeli retaliation across Iran's nuclear and weapons sites, and a US naval strike — then you can pause, rewind, and scrub the timeline to understand how it unfolds.

It is a scenario, not a forecast — a way to see what crossing the nuclear threshold would actually look like, with roughly 565,000 projected fatalities modeled against real population and wind data. Free, no account, in your browser.