Here's the time-lapse leading up to the missile…

https://video.twimg.com/ext_tw_video/1006681031569625088/pu/vid/1280x720/xSJMeIQNUAAwYJ2N.mp4?tag=3

Photos appear to be taken every ≈40s and were at a 20s exposure, so there's a dead space of about 20s between each frame… would explain why we don't see the trail from the ground.

Recommend downloading and going frame by frame at the end. There is nothing visible in the clouds before the "missile" streaks past.

Mapped it out and there's no way it was the airliner. Flight path from the Air Ambulance company does match; however, it's odd that we do not see the heli through any other breaks in the clouds in the moments leading up.

^Also, from looking at the photo, the missile's trajectory appears to be heading South-Southeast. I do not think this missile was headed towards AF1 over Alaska.

It seems more likely that it was heading towards Seattle which would have given the military just minutes to respond. Sounds like a pretty gnarly FF to me… nuke a major city on a Sunday before most of us have woken up.