A B-1B Lancer strategic bomber, F-35A and F-35B stealth jets of the U.S., and F-16K and F-15K fighters of South Korea fly in formation over the Korean Peninsula in an annual joint Korea-U.S. air force drill. Courtesy of Air Force

South Korea and the United States conducted a joint air exercise Friday focusing on enhancing the capabilities of striking North Korea's missile-related facilities, hours after it fired another long-range ballistic missile, according to Seoul's military.

The South Korean Air Force's F-35A stealth fighter jets held the exercise striking North Korea's Transporter Erector Launcher vehicles with GBU-12 aerial laser-guided bombs, the Joint Chiefs of Staff (JCS) announced.