A 493rd Fighter Squadron F-15C Eagle from the 48th Fighter Wing at Royal Air Force Lakenheath, England, takes off from Rovaniemi Air Base, Finland, May 22, in support of Arctic Challenge 2017. Multinational exercises such as ACE 17 are opportunities for the U.S. to continue developing its strong relationship with European allies and partners. (U.S. Air Force photo/Airman 1st Class Abby L. Finkel)