The Pentagon's policy chief on Tuesday distanced the United States from the death of Iran's Supreme Leader Ayatollah Ali Khamenei, saying he was killed by an Israeli strike.Testifying before the Senate Armed Services Committee, Elbridge Colby said the strike that killed Khamenei and other senior Iranian leaders was not part of the American military campaign."Those are Israeli operations," Colby said, pushing back when pressed by lawmakers about whether regime change was an objective of US action...