U.S. Air Force F-15E Strike Eagle aircraft assigned to the 48th Fighter Wing, Royal Air Force Lakenheath, England, fly in formation with a KC-135 Stratotanker aircraft assigned to the 100th Air Refueling Wing from RAF Mildenhall, England, Feb. 24, 2021. The flight was in support of Estonian Independence Day, promoting defense cooperation, key to the U.S-Estonia relationship. (U.S. Air Force Photo by Airman 1st Class David C Busby)