CARTAGENA, Spain (March 10, 2022) Sailors assigned to Portuguese navy NRP Viano de Castelo (P360) begin NATO's Operation Sea Guardian (OSG) focused operations 22.2 from Cartagena Harbour March 11. OSG is a non-Article 5 maritime security operation aimed at working with Mediterranean stakeholders to maintain maritime situational awareness, deter and counter terrorism, and enhance capacity building. (NATO photo.)