Three disc objects flying 30 k ft overhead.

I was at a county park with 2 family members.  We all were looking in the sky and noticed something that looked like white metal in a cloud.  We thought it might have been the International Space Station reflecting off light from the sun.  As we continued to watch the sky, I saw three disc shape objects in a triangle formation flying by.  They were well over 30,000 feet in the sky.  The discs looked identical.  They were equally half white and half of a grey shade with a dividing line of symmetry along a diagonal line.  They seemed to just be floating by in the clouds. There was no sound that I could hear from the objects.  Not sure what to make of it.  Could be spacecraft from another world.  It could be government technology that disguises jet aircrafts.  Anything is possible at this point.
Witness elects to remain totally anonymous; provides no contact information.  PD