Launching an indirect attack on two municipal practices that allegedly increased residential segregation in Chicago, Albert C. Hanna sued under the False Claims Act, contending the city obtained more than $1 billion by submitting false certifications to the U.S. Department of Housing and Urban Development about complying with anti-discrimination statutes and regulations.“Hanna is a longtime resident of Chicago’s Lincoln Park neighborhood,” the 7th U.S. Circuit Court of Appeals explained in Hanna’s …