The Army's research facility includes a permafrost tunnel — about a third of a mile long — that has Ice Age-era animal bones jutting out from the walls.
Texas Guard soldiers now have the authority to help detain and deport undocumented people under an agreement between Texas and the Trump administration.
Russia has deployed thousands of troops to the Arctic region for training and is expected to field 13 polar icebreakers by 2035. The U.S. has only one working heavy polar icebreaker.