In “Bringing Child Homelessness into Focus,” the internationally renowned photographer Craig Blankenhorn shares his work documenting homeless families across the country. “A Sweet Mission,” features the Yonkers-based Greyston Foundation, with its open-hiring policy for the Greyston Bakery and its programs to employ, train, support, and encourage struggling adults who are trying to provide for their children. These stories are just two components of our Spring issue, whose many perspectives on a growing problem offer a wealth of information, insights, and challenges.…