[BloodnGuts]

I want to know why the plane was observed from the ground well before the crash but supposedly, the pilots were blinded by fog!

There is little doubt in my mind that there was equipment failure - accidental or otherwise.

[MadMax, the Grinning Reaper]

Katyn Forest Massacre - Part 2!

[diogenes ghost]

Fog can often be easily seen through vertically, but not horizontally. What may appear thin to an observer looking up at a plane may well be very thick to the pilot looking forward.

And at jet approach speeds, obstacles loom very quickly.