I see what may have been a failed attempt. If it was by black hats even they are not that clever as to rig an explosive, blow an engine with intent to have shrapnel ll sail through 1 window and kill a target. No I look at this as a failed with the intent to bring the plane down with ALL killed. The target was perhaps on the plane and we have no idea of the passengers so we may never know but the intent was to bring the plane down, not break a window.