A group of 184 Cubans, who had traveled through Guatemala to reach Mexican territory at Ciudad Hidalgo in the southern state of Chiapas, received from Mexican authorities a provisional visitor's document which, for humanitarian reasons, allows them to travel the length of this country to the United States. The 39 families, which include a number of pregnant women, left Costa Rica last Thursday on a flight to El Salvador, from where they traveled in four buses through Guatemala to the Mexican border. The National Migration Institute, or INM, provided the 184 Cubans with a provisional visitor's document granting them up...