Military RAF Mildenhall refueled B-1B over the North Sea Last updated: May 9, 2020 09:58 AIRLIVE 4 years ago 0 Min Read RAF Mildenhall refueled B-1B Lancers from Ellsworth AFB, South Dakota over the North Sea. With the fuel the B-1Bs ended up flying all the way to Eastern Europe to train with NATO allies and partner nations.