Gliding white soundless aircraft, shaped like a thin semi-circleSaw gliding light, white soundless aircraft gliding in sky. Shaped like a thin semi-circle. Moved fast and was very large. Second one was about 20 minutes later just higher up, flying on the exact same path. No lights, just looked like it was reflecting light from the full moon. It was the night of the Perseids Meteor showering which is why we were looking up. Second odd object we have seen on the Perseids Meteor shower night. It was odd this time because it was so quiet that night yet we could hear nothing from the aircraft.((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))