Eight thousand troops perform military exercises like hauling artillery, deploying attack helicopters, and parachuting into Alaska's Arctic tundra. Here's a closer look at their training and who they're preparing to battle.
U.S.
US Air Force/Senior Airman Joseph Pick
US Navy photo
Moscow has sought deals to buy back helicopter engines it previously sold to other countries.
REUTERS
Left: REUTERS/Sergey Pivovarov; Right: Defense Intelligence of Ukraine
Leonid Faerberg/SOPA Images/LightRocket via Getty Images
REUTERS/Sergey Pivovarov

In 1962, John Glenn became the first U.S. citizen to orbit the Earth, riding into space on board the Friendship 7 capsule, which took off from Cape Canaveral’s Launch Complex 14. More than 60 years later, that same old launchpad will be put to new use after being assigned to a private space venture to launch its…