Facebook says global ads chief Carolyn Everson is leaving after more than a decade; Everson was a liaison to big marketers during major controversies (Megan Graham/CNBC)

Megan Graham / CNBC:
Facebook says global ads chief Carolyn Everson is leaving after more than a decade; Everson was a liaison to big marketers during major controversies  —  – Facebook global ads chief Carolyn Everson is departing the company.  — Facebook is an advertising giant that is expected to command nearly …