How TikTok grew from a fun app for teens into a potential national security threat

TikTok, originally a merger of ByteDance's Douyin and Musical.ly in 2017, has faced escalating national security concerns in the U.S. due to its Chinese ownership. Despite attempts to improve U.S. relations, the app is ordered to be banned unless ByteDance sells within the U.S. A Supreme Court upholds this decision, leading to its shutdown in the U.S.