White light moving West to East at a high rate of speed.The object was seen traveling from west to east at a high rate of speed either in the upper atmosphere or in space. It was a brilliant white and then disappeared in the earth's shadow. It moved approximately 3x faster than the ISS does when it is able to be seen. I grew up around the Sierra Nevada in Central CA, been around Edwards AFB, worked as a firefighter on a helicopter throughout the Western United States, and am currently a teacher. I know what I saw, and this vehicle was moving incredibly fast for the altitude it was traveling at.((NUFORC Note: We spoke via telephone with the source of the report, and he impressed us with his eloquence and his serious-minded demeanor. We suspect that he is a very skilled, and reliable, witness. PD))((ADDENDUM FROM WITNESS))Bright, round light moving fast traveling from West to EastThis object was round and white and looked like the planet Venus in the night sky. It was moving 3x faster than the ISS when seen from Earth. It was moving from West to East, and faded into the earth's shadow south of my location. I saw a similar object over my house in November 2016 traveling from South to North with the same speed. No sound was emitted from the vehicle.((END ADDENDUM))