Mexico's crackdown on migrants sends some heading south

Mexico's efforts to slow Central American migration across its territory showed some bite Monday as some people turned around to head south in the face of increased enforcement, while government officials said they would target human smuggling rings.One government official announced Monday that the 6,000 National Guard members who officials had repeatedly said would be sent to the southern border will actually be distributed across the northern border and other areas as well, while another sugge