As I know there were two planes.
There was weather changing going on?
Anyway, regarding the earlier flight, it was a Yak-40 with journalists, and it landed safely earlier in the morning. A Russian IL-76 then made two approaches and diverted to Moscow.
They landed at Smolensk because it was made available and wouldn't take a day of ground travel to get to Katyn (as would have been the case had they gone to Minsk or Moscow). The airport is just fine when the weather is ok. They have an NDB approach available there, but no approach lighting.
Here's the weather for that morning, it's not unusual especially considering the spread at dawn.
10:00Z (1pm) Temp 3°C Dew 2°C Humidity 94% QNH 1025 hPa Visibility 4 kilometers Winds east 14.4 km/h / Mist
07:00Z (10am) Temp 1°C Dew 1°C Humidity 98% QNH 1026 hPa Visibility 0.5 kilometers Winds SE 10.8 km/h / Heavy Fog
04:00Z (7am) Temp 0°C Dew -1°C Humidity 89% QNH 1025 hPa Visibility 4 kilometers Winds ESE 7.2 km/h / Mist
01:00Z (4am) Temp 3°C Dew -0°C Humidity 72% QNH 1025 hPa Visibility 10 kilometers Winds SE 7.2 km/h /
22:00Z (1am) Temp 6°C Dew -0°C Humidity 52% QNH 1025 hPa Visibility 10 kilometers Winds SE 7.2 km/h
Three mistakes simply because the pilot couldnt land so he made a circle three time and obviously knew that he didn't suppose to land but somehow risked it??? Weird.
Not really that weird, happens all the time. "Get-there-itis". Think about the pressure the crew was under. There was no back up plan. **** poor planning.
And again there were witnesses (regular people), saying the plane was unbalanced, meaning crashed on one side and the distance was apprx. 400-500 meter. For the pilot if it's a fog issue still it's not a problem to control the balance, even if u are going to crash.
Unless you clip something. See the accident report earlier.
Also if it would've been any other country, then it wouldn't sound as suspicious but it's Putin we talk about, guy who promoted all the misbalance in Ukraine, Georgia and now in Kirgizia, if u think of it it's the same pace plan.
According to others here, those were because Soros and the Jews (and possibly Vatican Nazi Zombies).
Occam's razor is a good place to start, and work back from there.