More than a half-century after federal troops escorted nine black students into an all-white school, efforts to desegregate Little Rock’s classrooms are at another turning point, the Huffington Post reports. The state wants to end its long-running payments for desegregation programs, but three school districts that receive the money say they need it to continue key programs. And a federal judge has accused the schools of delaying desegregation so they can keep receiving an annual infusion of $70 million…