RED SEA (Oct. 25, 2021) Sailors aboard the guided-missile destroyer USS O'Kane (DDG 77) fire a .50-caliber machine gun during a live-fire exercise as part of joint exercise Indigo Defender. Indigo Defender 21 is a capstone bilateral maritime exercise between Royal Saudi Naval Forces and U.S. Naval Forces Central Command to enhance interoperability and strengthen our capacity to maintain regional maritime security and stability. (U.S. Navy photo by Mass Communication Specialist Seaman Elisha Smith)