Formidable Shield The Air Defense Frigate Forbin sailed off the coast of Scotland, May 22, 2021. It is taking part in the combined air and missile defense exercise Formidable Shield 2021 off the coast of the United Kingdom. SHARE IMAGE: Download Image: Full Size (0.22 MB) Tags: Formidable Shield Photo By: Courtesy, Naval Striking and Support Forces NATO VIRIN: 210522-O-NO901-0101.JPG Photo Gallery