Tobacco executives lied under oath to Congress about the addictiveness of nicotine.

In 1994, top tobacco bosses testified before the US Congress. They swore under oath that nicotine was not addictive and that they did not manipulate nicotine levels to hook smokers. However, internal documents later proved they knew nicotine was highly addictive. In fact, a court in 2006 found them guilty of a massive, 50-year conspiracy to lie to the public about the dangers and addictiveness of smoking.