Architect Daniel Libeskind first gained worldwide attention when his haunting, zigzag-shaped Jewish Museum opened in Berlin in 1999. After his dramatic urban design plan for Ground Zero was selected by city and state officials in 2002, Libeskind became a household name in America. Now, with his first work of architecture to be realized in the U.S. -- an addition to the Denver Art Museum -- the American public has a chance to examine his unconventional...