A serious crash Friday night shut down Lake Wheeler Road in Wake County. The WRAL Breaking News Tracker was at the scene. According to a state trooper, the crash involved three cars. The trooper ...

Learn more here. In 1942, the Manhattan Project needed to create a chain reaction—a crucial step toward proving that it would be possible to make an atomic bomb. The scientists achieved this sustained ...

These ejected neutrons can split other nuclei, which release other neutrons to split still other nuclei, and so on: a self-sustaining chain reaction. If this chain reaction went too fast ...