ATLANTIC OCEAN (May 21, 2021) Royal Canadian Navy sailors assigned to the naval boarding party team aboard the Canadian navy frigate HMCS Halifax (FFH 330), flagship of Standing NATO Maritime Group 1, conduct a boarding exercise off the coast of Portugal, May 21, 2021, during Exercise Steadfast Defender 21. The exercise is part of Halifax's combat enhancement and force integration training. Steadfast Defender is a defensive exercise based on an Article 5 scenario which is designed to deter aggression and respond to crisis if necessary. (Photo courtesy of the Royal Canadian Navy by Sailor 1st Class Bryan Underwood)