The story

Why Butte?

Of the many unanswered questions surrounding a weekend plane crash that killed the pilot and three families headed for a Montana ski vacation, the first one investigators are examining is why the pilot asked for permission to land in Butte, about 80 miles short of their planned destination, the National Transportation Safety Board said Tuesday.

"It's a question," Mark Rosenker, the NTSB's acting chairman, told reporters. "There's a lot of questions, but it begins with that question." Read full article »

CNN's Ted Rowlands and Paul Vercammen contributed to this report.

All About MontanaU.S. National Transportation Safety Board