On the militarized Turkish-Greek border, Afghan migrants brave minefields to cross into Europe--only to be summarily ejected by Greek border guards. At Ceuta and Melilla, Spanish enclaves in North Africa, migrants are turned back with razor wire and live ammunition. Deportees from the U.K. and France have died of "positional asphyxia" on deportation flights, strapped to chairs, their mouths sealed with tape. In a brilliant and shocking account, Fortress...