Antonio Perez joins dozens of immigrants, many of them Mexican citizens, as they gather in sleeping quarters at a well known immigrant shelter, as many are making tough decisions on whether to try their luck at trying to make it to the United States, by illegally crossing the border, Thursday, Aug. 9, 2012, in Nogales, Mexico. The U.S. government has halted flights home for Mexicans caught entering the country illegally in the deadly summer heat of Arizona's deserts, a money-saving move that ends a seven-year experiment that cost taxpayers nearly $100 million.(AP Photo/Ross D. Franklin)