Moses Pendleton often sits at home by a roaring fire, listening to classical music and studying how the logs break apart and form abstract shapes. Flames leap and dance hypnotically, almost like the serpentine movements of the dancers who bring his choreography to life.

There is a moment early on in Cirque Du Soleil’s Luzia when water pours down from the big top ceiling, droplets shimmering like falling diamonds. A trapeze artist and another acrobat spinning across the stage floor in a large metal ring twirl into and out of this waterfall. It’s a dreamlike …

David Hein and Irene Sankoff thought the idea was far-fetched when it was first suggested they write a musical about what happened after 9/11 when 38 planes that were in the air were diverted to Gander, Newfoundland, population 11,000.