GLENDALE, Calif. ¨C I was en route to meet Groot.
Not an imitation Groot conjured with video or those clunky virtual reality goggles. The Walt Disney Co.¡¯s secretive research and development division, Imagineering, had promised a walking, talking, emoting Groot, as if the arboreal ¡°Avengers¡± character had jumped off the screen and was living among us.
But first I had to find him. GPS had guided me to a warehouse on a dead-end street in Glendale, a Los Angeles suburb. The place seemed deserted. As soon as I parked, however, a man warily appeared from behind a jacaranda tree. Yes, I had an appointment. No, I was not hiding any recording devices. He made a phone call, and I was escorted into the warehouse through an unmarked door behind a dumpster.

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