What the industry knew, and when it knew it, are the issues examined in this article.

Once secret industry memos and other court-released documents address industry manipulation of tobacco's addictive properties.

New York Times article reports on confidential internal memos of Philip Morris, Lorillard, and RJ Reynolds.

Once-secret memos show the tobacco industry had a sophisticated and scientifically accurate understanding of nicotine pharmacology, including an explicit recognition of nicotine's addictiveness, more than 30 years ago.

News article; secret memos reveal that Philip Morris officials suggested that internal documents about research should be destroyed, and negative information should be kept secret.

AMA scientific article. Tobacco industry documents "reveal that for decades, the industry knew and internally acknowledged that nicotine is an addictive drug and cigarettes are the ultimate nicotine delivery device; that nicotine addiction can be perpetuated and even enhanced through cigarette design alterations and manipulations."

"Inside the restricted laboratory compound on the south coast of England, five senior scientists for BAT Industries, the world's second-biggest cigarette maker, were devising ways to make it harder for people to quit smoking..."

News article follows the trial of industry memos that discuss how and why to manipulate cigarette chemistry.

Industry documents over time reveal the history of product engineering for addiction.

Article on tobacco industry research into nicotine and addiction, and R&D efforts to engineer more addictive product.