CIA mathematicians analyzed the trajectory of a North Korean nuclear missile and a US defensive missile launched to intercept it. They graphed the distance traveled by each missile over time and calculated the average speed. Using the line of best fit equations and substitution, they determined the missiles would intersect after 10.41 days at a distance of 232,323.55 miles from Earth, safely past the moon's average distance of 238,897 miles. Some error is possible since the missile paths are estimated and not constant.