Please provide me with the context or question you'd like me to answer. "What happens" is too broad without further information. I need more details from the transcript of the video to give you a useful response.
This video explains what would happen if an anti-ballistic missile destroyed a nuclear missile in mid-air. It details the process of nuclear detonation, focusing on the chain reaction required, and discusses the consequences of a successful interception, highlighting the reduced threat despite potential radiation hazards.
Based on the provided transcript, the video states that a mid-air explosion of a nuclear missile is highly unlikely due to the disruption of the precise conditions needed to initiate the chain reaction. However, if a nuclear missile is destroyed mid-air, the dispersed plutonium or uranium core creates a radiation hazard, which is a different but still significant danger compared to the widespread devastation of a ground detonation. The video emphasizes that a successful interception significantly reduces the lethality of the weapon, changing the threat from city-level destruction to a localized radiation problem.