LOOK: B-52 and B-1 Bombers Fly with Gripens over Stockholm March 6, 2024 | By Greg Hadley With Sweden poised to officially join NATO in the next few days, the U.S. Air Force celebrated March 6 with a rare double bomber flyover of a B-52 Stratofortress and a B-1 Lancer over Stockholm, accompanied by Swedish Air Force Gripens.