When three-month-old Lia Lee arrived at the county hospital emergency room in Merced, California, a chain of events was set in motion from which neither she nor her parents nor her doctors would ever recover. Lia's parents, Foua and Nao Kao, were part of a large Hmong community in Merced, refugees from the CIA-run "Quiet War" in Laos. The Hmong, traditionally a close-knit and fiercely people, have been less amenable to assimilation than most immigrants,...