You can get the FlightAware track in KML format by clicking on the Goggle Earth link (it appears after the flight is completed):How did you do that! Have you mixed a FlighAware track into Google Earth? Looks cool whatever it is!
KML files of the flight tracks are also available from FR24 (only to the subscribers).
I've just opened the DAL405 file (attached) in Google Earth and looked at it from your location. The opaque (black) section is for the time interval from 10:22 to 10:23 UTC, the Sun position is at the 10:23 as well.