According to a recent study conducted by WeillCornell Medical College stress associated withfear of terrorism has increased cigarette smoking.In particular, after the attacks of 11 September2011, 1 million Americans have resumedsmoking. The study is based on data collectedfrom the Behavioral Risk Factor Surveillance System, a system that collects information onhealth risk, calculated an amount of 850 milliondollars spent on this harmful behavior. LeaderMichael Pesko study suggests that tobacco userssince the first months of its launch, of differentstress should consult with their doctors to avoidcreating psychological dependence.