White line in the sky at Sunset turns upward and takes off with a large plume behind like a launched rocket.

On or about September 8, 2020. I was on my porch in Forest Hills, PA at sunset. I always have binoculars nearby. The sunset was beautiful and the clouds were pink. I noticed what appeared to be a white line in the sky. Kind of like the contrail of a plane. It was traveling horizontally and seemed little bit unusual.
I watched it for a short while then it made an abrupt turn upward. I picked up the binoculars and saw that it became like a rocket with a large plume behind it. As it traveled upward, I watched it as the sun lit up the plume to pink. I could see that at the top it was cone shaped just like a rocket. I watched it until it disappeared into the cloud cover.
I searched the internet for anyone who might have seen the same thing.
How can a rocket take off in mid air? Can you tell me what I saw that day?