Picture of the Day: Strategic Aircraft Fly Over South Korea During Vigilant Ace Exercise

Korea-U.S. joint air force drill

A B-1B Lancer strategic bomber, two F-35A and two F-35B stealth jets of the U.S., and two F-16K and two F-15K fighters of South Korea fly in formation over the Korean Peninsula in this year’s annual joint Korea-U.S. air force drill, Vigilant Ace, on Dec. 6, 2017, in this photo provided by the air force. The exercise against North Korean provocations is the biggest in its history. (Yonhap)