A gun rights group has asked the Federal Bureau of Alcohol, Tobacco and Firearms to investigate whether a gun purchase by Sarah Brady, a leading gun control advocate, acknowledged in her autobiography, violates state and federal gun laws. The group, Citizens Committee for the Right to Keep and Bear Arms, is up in arms over a claim Brady made in her book, "A Good Fight," in which she said she bought a .30-06-caliber rifle from a Delaware gun shop. Brady, head of the Brady Campaign to Prevent Gun Violence, wrote that she purchased the rifle for her son, but noted...