Mourners filled Tehran on Monday for the funeral procession of Iran’s late Supreme Leader Ayatollah Ali Khamenei, who was killed at the beginning of Operation Epic Fury.

Just days before his arrival in Turkey for the annual NATO summit, President Trump made it clear that in his mind, he and the world's largest defense alliance are not on good terms.

CNN News Central's Sara Sidner and CNN International Diplomatic Editor Nic Robertson discuss how new Russian strikes in Ukraine could affect critical talks at this week's high-stakes NATO Summit in An...