So, standing on my porch having a smoke, and what i thought was a dark cloud over downtowwn anchorage i noticed it slowly moving but not in a cloud movement, you could see it move to see its length and then its width. was a dark grey object. i grabbed my binoculars. When i returned to get a better look it was farther away and when i looked from what i observered it had a "smokey trail". i have no idea what i saw so if anyone also saw this event id love to read what you saw.