03 May 2021 Allied Forces Prepare for the Start of Exercise At-Sea Demo/Formidable Shield 2021 FERROL, Spain - The Spanish Álvaro de Bazán-class frigate ESPS Cristóbal Colón (F-105) is this year’s designated flag ship for the execution of Exercise At-Sea Demonstration/Formidable Shield 2021, scheduled to take place May 15 to June 3...