The immigration of thousands of people from Casa Blanca to Tulsa is causing social problems on both sides of the border. Here you will find all of the stories in the Tulsa World's special series on Casa Blanca.

• Day 1
• A peculiar immigration history ties Tulsa to Casa Blanca, Mexico, and has brought thousands of immigrants -- legal and illegal -- from Casa Blanca to Tulsa.
• Day 2
• Life in Casa Blanca isn't easy, and every year more people leave for Tulsa. "A lot of kids have the idea in their heads already," says one resident.
• Day 3
• Casa Blanca and Tulsa often share a symbiotic relationship. But there are also problems.
• Mexican town will feel crunch
• Every migrant and every family returning to Casa Blanca is a short-term injection of cash and happiness and a long-term drain of dollars and hope in this dusty high-plains town.
• Law cited in reverse migration
• Uncertain what might happen, many illegal immigrants are leaving the state for Mexico.