Ayatollah Ali Khamenei, Iran's supreme leader since 1989, has been killed by an Israeli airstrike at the age of 86. During his rule, he fought hard to prevent the modernization of the Islamic Republic ...

Monday - Friday, 6:00 - 9:00 AM ET United States Monday - Friday 6a ET Europe Monday - Friday 13:00 CET Asia Monday - Friday 18:00 SIN/HK Australia Monday - Friday 20:00 SYD "Squawk Box" is the ...