This drill says they keep the war next door off their minds and focus on getting better. it is important on the level of training that you reach. reporter: it is quite real right now. it is next door. yes, it is real. and we are prepared for it. reporter: re the u.s. says exercises like this one have become more important since russia s invasion of ukraine, to strengthen the nato alliance and deter moscow from aggressive moves against member countries. also very important because one of the things that president biden keeps saying, john, he said he believes vladimir putin thought that the u.s. and its allies would be divided. but they re very much united and the nato alliance would be weakened, however it is very strong and could become a lot more strong in the not too distant future with possibly sweden and finland asking to join as well. i m so surprised that the access you had to that, fred. that was fascinating to see, the black sea operating right very close to where