John Branch, who wrote “Snow Fall: The Avalanche at Tunnel Creek,” a multimedia project that appeared online this week and appears in print on Sunday, answers questions from readers about the undertaking.

http://www.nytimes.com/projects/2012/snow-fall/#/?part=tunnel-creek

http://www.nytimes.com/2012/12/22/sports/q-a-the-avalanche-at-tunnel-creek.html?pagewanted=all&_r=0