Virginia has executed 41-year-old Teresa Lewis by lethal injection for conspiring in the murder of her husband and stepson. Lewis' case drew attention around the world because she is the first woman executed in the US in 5 years and the first in Virginia in nearly a century. Her supporters say she is borderline mentally retarded and was manipulated into helping with the murders. Read more about her case and failed bids for appeal here. (More Teresa Lewis stories.)