U.S. B-52 bombers and around 60 other aircraft are taking part in NATO’s weeks-long nuclear exercise, which kicks off on Monday amid Russian threats of nuclear war. According to a statement by the North Atlantic Treaty Organization (NATO), 14 countries and up to 60 aircraft will take part in the nuclear exercise known as “Steadfast Noon.” A NATO official said part of the exercise would be held more than 625 miles from Russia, VOA reported. NATO described the exercise as “a routine, recurring training activity” that is “not linked to any current world events.”