Project Black Arrow

Project Black Arrow, shrouded in secrecy, was a daring mission undertaken by the United States that delved deep into mainland China. During this mission, they discovered that the Chinese had constructed a fusion reactor five miles underground. This considerable depth was intended to provide safety from potential surface catastrophes that could threaten humanity and devastate the Earth's surface—a scenario of unimaginable destruction. However, no one considered the possibility of an event where the reactor could sink into the Earth's core. Nevertheless, that is precisely what happened.