[seele]

The official explanation of catastrophe was hitting the birch during landing attempt... while the airplane was at about 30 meters of altitude (yes, it was a birch not sequoia).

[p_l]

At that speed, it could easily cut through the rather delicate construct that is an airliner's wing, especially close to tip as it did.

[TWAndrews]

Not a lot of 30m birch trees around.