Christiane Amanpour, CNN's chief international anchor, is leaving the network after 43 years. She will sign off next year, ending one of the longest runs in American television news. Amanpour made her name reporting from conflict zones and interviewing world leaders across decades of coverage. Her departure lands at a turbulent moment for the broadcaster. CNN is coming under controversial new ownership after the biggest media deal in history. The takeover has already stirred debate about what the network's news coverage will look like. The veteran anchor leaves as one of the best-known faces of the channel just as it prepares for the change.