Witnessed one Bright Purple/Blue glowing Teardrop light travel from South to North completely across sky- Teardrop shaped light traveled from horizon to horizon in 10 to 15 seconds- Fastest thing I have ever seen -Much faster than Space station- It was Very Bright Purple Blue in color and left a trail that was slightly glowing for a few seconds the same color - Traveled in a Fast smooth arch across the sky - color/brightness did not change -no blinking lights - did not look like meteor - Whatever it was it looked Very Large and Im guessing a distance of 10 miles from me and 15K feet in altitude but it is really hard to tell at night - No sound - sky was clear.((NUFORC Note: Source of report indicates that the date is approximate. PD))