not supposed to be mistakes...I remember seeing something simular in the early 80’s but it crossed several states. they never reported what that was either.
The North Koreans just got it backwards. That’s all.
Did anybody ask NORAD if they were tracking it? Where did it land? If it is ballistic it must follow the parabola and land somewhere. It certainly didn’t resemble something like a shuttle launch where it goes UP in a hurry. That contrail was bending in the boost phase, right?