I think it is important to talk about all possible aspects of this amazing incident...while we could wait for ONE YEAR while NTSB gives us the real story (as they see it), what is to say that just by chatting here someone will have gleaned enough info to be more careful with his/her own flying.
I would like to point out that there have been accidents within an hour of sunset or sunrise...does anyone recall the LAX cleared to land on top of another plane...pilots staring into the sun for hours on a transcon flight...and descending into the dark?
or the recent comair crash in kentucky, just before sunrise
these times of day demand special attention from pilots...and CONTROLLERS