Shrimp and Crab Gumbo

Name: Shrimp and Crab Gumbo
Ingredients: 1⁄3 cup all-purpose flour; 3 slices bacon, diced; 2 cups finely chopped onions; 1 1⁄2 cups finely chopped green bell peppers (about 1 large); 4 celery ribs, thinly sliced; 4 garlic cloves, minced; 1 cup water; 2 (14 ounce) cans fat-free low-sodium chicken broth, divided; 2 teaspoons cajun seasoning; 1⁄2 teaspoon salt; 1⁄4 teaspoon crushed red pepper flakes; 1 (16 ounce) bag frozen cut okra, thawed; 1 lb peeled and deveined medium shrimp; 2 (6 ounce) cans lump crabmeat, drained (such as Chicken of the Sea); 3 cups hot cooked long-grain rice; hot pepper sauce (optional)