COLUMBIA, S.C. (AP) — Four of the five largest U.S. tobacco companies sued the federal government Tuesday over new graphic cigarette labels that include the sewn-up corpse of a smoker and a picture of diseased lungs, saying the warnings violate their free speech rights and will cost millions of dollars to print. The companies, led by R.J. Reynolds Tobacco Co., Lorillard Tobacco Co., said the warnings no longer simply convey facts to allow people to make a decision whether to smoke. They instead force them to put government anti-smoking advocacy more prominently on their packs than their own brands, the companies say.