Details are emerging from the Montana plane crash that killed 14 on Sunday: Investigators suspect that ice buildup on the wings was a factor, just as it was in the crash in Buffalo last month that killed 50. However, the plane had neither a voice recorder nor flight data to confirm the suspicion. Also, the plane was carrying more passengers than it was licensed for, although, since many of the passengers were children ages one to nine, the extra weight may not have been a factor. "Lap children can be allowed on an aircraft up to the age of two," said the chairman of the National Transportation Safety Board. "We can't tell you if in fact they were sitting on the laps or not."