By Lizbeth Diaz MEXICALI, Mexico (Reuters) - Camped in migrant centers, broken-down rooms of a dingy, semi-derelict hotel and on church floors, thousands of Haitians desperate to enter the United States are in limbo and exposed to crime in dangerous border neighborhoods of Mexico. The hard-bitten fringes of Tijuana and Mexicali are currently believed to house some 5,000 Haitians, and about 300 more are arriving daily after an arduous journey from Brazil, Mexican official numbers show. The Haitians are not yet trying to slip illegally through the desert brush into the United States.
