Skating on a once-in-a-decade 'ice window' in Alaska - BBC News
Footage shows an ice rescue instructor skating on a rare window of ice in Alaska's Alpine lakes.
Footage taken by an ice rescue instructor and his wife showed them skating on a rare "ice window" in Alaska's Alpine lakes.

Luc Mehl, who is also an outdoor educator, said that weather conditions had allowed Rabbit Lake to freeze in a way that the ice became see-through because of an "unusually cold but dry transition into winter".