A crucial and historic battle in the war between the tobacco industry and smokers began with Jeffrey Wigand, a doctor of biochemistry with a career focus on health issues who became the Vice President of Research & Development at Brown & Williamson in 1989. He was hired to research safer means of delivering nicotine by reducing the harm of other tobacco compounds. At the time, both the addictiveness of nicotine and the health hazards of cigarettes were well known by the company and the industry, but kept a fiercely guarded secret. Wigand soon found his research and recommendations discouraged, ignored and censored, leading to confrontations with the CEO, Thomas Sandefur. Thwarted and frustrated, Wigand turned his attention to improving tobacco additives, some of which were designed for "impact boosting", using chemicals like ammonia to enhance absorption of nicotine in the lungs and affect the brain and central nervous system faster. Wigand believed this process was a deliberate attempt to increase addiction to cigarettes.