See: First, they came for the penguins
"And Tango Makes Three," the award-winning children's book based on the true story of two male penguins who hatched an orphaned egg and raised the chick together, was removed from general circulation in Loudoun County, VA elementary school libraries. Loudoun County Public Schools Superintendent Edgar B. Hatrick overrode the recommendations of both school and district-level review committees to make the unilateral decision. Censorship issues have previously become highly contentious in the affluent, high-tech outer suburb of Washington, DC.
"And Tango Makes Three" was named the most challenged book of 2006 by the ALA.