Today: 

The U.S. will play host to the ISU World Figure Skating Championships, coming to TD Garden this week. We talk about the art and physicality behind the sport – and the tragic loss of friends and colleagues in that DC plane crash – with the Skating Club of Boston’s Doug Zeghibe and Olympic skater Ashley Wagner.

And, Sky and Telescope senior editor Kelly Beatty discusses the impacts of Sunita Williams' extended stay in space.