high school students in January and desegregation of senior high schools in September of the following year.196 After remand from the court of appeals, the district court ultimately ordered the implementation of a desegregation plan for all but the twelfth grade in January. The new plan increased the percentage of children eligible for busing from 48% to 56%. Its major impact was on elementary school children where the percentage of children eligible for bus transportation increased 11%. Under the plan, only two schools would be more than 50% black. The longest bus trip was 35 minutes and the mean average for bus transportation was 14 minutes.197 Nearly a decade after the decision in Prince George's County, the plaintiffs returned to federal district court. The suit attacked the conduct of the school system in relation to faculty hiring, faculty assignments, special education for the handicapped and for talented and gifted students, student discipline, student classroom assignments and student assignment to schools. The Court denied plaintiffs' claims with respect to all challenges except student assignment to schools. Plaintiffs demonstrated that programs of special education for the handicapped for mental rather than physical handicaps contained a disproportionately large percentage of black students, that programs for talented and gifted contained a disproportionately large percentage of white students, and that student discipline affected a disproportionately large percentage of black students. The court considered the statistics, but found that the plaintiffs failed to prove any improper motivation and pointed to efforts within the school system to expand the opportunities for black students to avail themselves of programs for the talented and gifted. Defendants claimed that racial imbalances in student assignments were a product of residential movement and not of deliberate segregation, and that the school system had ceased being dual after the court's initial order in 1973. The district court concluded, however, that a unitary system had never been achieved. Portions of Judge Kaufman's opinion follow: The racial composition of Prince George's County has changed dramatically since this court's 1973 desegregation decree. There was a sharp acceleration in black population growth in the decade of the 1970's, involving the addition of 155,000 black citizens and changing the black population percentage from 14% in 1970 to 37.3% in 1980. . . . During the 1970's, the white population declined. Prince George's County lost 170,000 white residents between 1970 and 1980, accounting for an overall slowing of population growth. In 1980, the percentage of black students in the county's schools was 49.9%, 12.6% above the countywide black population percentage of 37.3%. Mr. Grier [the defendant's expert witness on demography] testified that the disproportionately high number of minority children in the schools is due to the younger age of the new black parents of the county who have more school age children on the average than the white residents; to the incentive for white homeowners to sell their older existing houses to the incoming black families and to move to more expensive homes, within and without Prince George's County; and to a loss of whites from the schools because of the pendency of Vaughns in 1972 and this court's 1973 decree (sometimes called "white flight"). The growth in black population as well as the decline in white population 152