The newly released messages reveal how top U.S. officials planned military strikes against terrorists in Yemen.

A Pentagon-wide email revealed that Defense Secretary ... He was then privy to the texts, which included Waltz texting emojis of a fist, an American flag, and a flame to celebrate the attack.

U.S. national-security leaders included me in a group chat about upcoming military strikes in Yemen. I didn’t think it could be real. Then the bombs started falling.