Claim: Smolensk air disaster is a controlled flight into terrain, a plane which is unintentionally flown into an obstacle due to pilot error, which occurred in 2010, killing 400 passengers.
Evidence: The Smolensk air disaster occurred on 10 April 2010, when a Tupolev Tu-154 aircraft of the Polish Air Force crashed near the Russian city of Smolensk, killing all 96 people on board. 
Smolensk air disaster 96