OSAN AIR BASE, Republic of Korea -- U.S. Air Force F-35 Lightning IIs from the 356th Fighter Squadron at Eielson Air Force Base flew side by side with Republic of Korea Air Force F-35s from the 151st and 152nd Combat Flight Squadrons as part of bilateral exercise over the Yellow Sea. This combined training demonstrates our commitment to the defense of South Korea and is the foundation of maintaining a robust defense posture.