Shiny aluminum type in the sky

We were in the middle of a skirmish during a event at Nevada state prison doing training when something told me to look up in the sky. From my viewpoint what I saw could be described as a piece of aluminum foil rotating, and it was shiny from all angles. I tried to get some teams to look at it, and they couldn’t see it initially. At that point an airplane flew by and perspective, they could see what I was referring to. It continued to stay there for another three more minutes until it kind of just like a light switch went off and just disappeared.