I was standing on my lawn when I heard a military Jet screaming by afterburners on I looked up saw the jet then saw perfect circle

I was outside speaking with a neighbor when our attention was immediately drawn to the sky because we heard the sound of a military jet screaming just overhead the jet had to have been using his afterburner it was so loud we both looked up but did not see jet due to trees in our yard covering the sky I moved to my tree lawn and had a perfect view of the sky which was clear and temperatures were reaching 60 F. I now could see the Jet clearly coming from the North heading Southwest then I Noticed another higher in the sky coming from the Southwest as the two converge I clearly saw a perfect circle it was crystal clear as the jets approached each other the Circle just immediately disappeared extremely quickly. The circle appeared as the jets approached then it was gone. I said to my neighbor did you see that ? He did not due to where he was standing and did not have a clear view but I did it was extremely incredible. No question on what I viewed. The circle was perfect in dimensions the color was like a high grade silver with a polyurethane high gloss finish.