A US submarine surfaced through ice in the Arctic ocean on March 21.
The submarine was part of the 'Ice Exercise', a five-week naval exercise to train for operations in the region.
This video shows the USS Hartford breaking through the ice.
A US submarine surfaced through ice in the Arctic ocean on March 21.
A US submarine surfaced through ice in the Arctic ocean on March 21.
The submarine was part of the 'Ice Exercise', a five-week naval exercise to train for operations in the region.
This video shows the USS Hartford breaking through the ice.