and you can clearly see in the blown up image from the article you cited that it is a missile, so you are welcome to believe what some random author told you to believe and it was a "helicopter" I can make up my own mind.
and here is a long exposure of the space shuttle taking off
and here is a long exposure of a helicopter
I can see why the 'expert' was confused...
If this happened next to Whidby Island, you can be certain that anyone on Perimeter watch outdoors (the Marines) would have seen this. I have no doubt its in the Log, but that’s not something that the general public can access.
So explain to me why there are zero other sightings, especially of the naked eye type. These missiles are quite loud, too, and no one reported that, either. All in a crowded metropolitan area - 5 million people!
Radar logs were examined in a quick fashion that gave no one time to scour the logs. No reported radar sightings and nothing mentioned on ATC radios, by pilots or controllers.
At any given time there would be hundreds, if not thousands, of people looking at live Flight Radar data in the immediate vicinity, and recording it, roo. Not a peep from them, either.
But you forgot the "Russian Hacker"...: