Patrick Shearn at Walt Disney Concert Hall

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Suspended in mid-air inside Walt Disney Concert Hall is a cluster of large, fluffy clouds that emit music. It's an art piece designed by Patrick Shearn, whose company Poetic Kinetics has created many memorable music festival installations, and this summer's "Liquid Shard" in Pershing Square.

DnA catches up with Shearn about "Nimbus," "Liquid Shard," and what it means to work in the public and private sphere.