The footage shown on X / Twitter of a nuclear weapon is misinformation that is still going on a day after the initial event.#1. Both the US and Russia have a vested interest in detecting any nuclear detonation and have spent a lot of money on detection systems.#2. Any nuclear fallout would have been detected by now.#3. There are really only five reasons to use a nuclear weapon:1. Establish a breakthrough.2. Defend a breakthrough.3. Destroy an underground bunker / facility.4. Destroy a naval task force.5. Destroy an amphibious landing group or fording site.Go through all of these scenarios before believing that a nuclear weapon was used.