Personalized Brain Stimulation to Help Veterans Quit Smoking

Inclusion Criteria: * Veteran * Individuals who smoke 10 or more cigarettes per day and have a CO level \> 10 ppm indicative of recent smoking * Those who have not received substance abuse treatment within the previous 30 days * Those who have been stable on psychotropic medications for at least three months * For females, those who test non-pregnant and use adequate birth control * Those who are willing to provide informed consent * Those who can comply with protocol requirements and likely complete all study procedures * Those who are motivated to quit smoking (based on responses of "very likely" or "somewhat likely" in the motivation questionnaire Exclusion Criteria: * Current moderate to severe substance use of any psychoactive substances other than nicotine or caffeine, as defined by DSM-V criteria * Contraindications to MRI (e.g., metal in the skull, orbital or intracranial cavity, or claustrophobia) * Contraindications to rTMS (history of a seizure or epilepsy) * A history of autoimmune, endocrine, viral, or vascular disorders affecting the brain * History or MRI evidence of neurological disorder that would lead to local or diffuse brain lesions or significant physical impairment * Unstable cardiac disease, uncontrolled hypertension, severe renal or liver insufficiency, or sleep apnea * Major Axis I disorders diagnosed according to DSM-V criteria, such as bipolar affective disorder, schizophrenia, dementia, or major depression * Regarding the Veteran population, the investigators will enroll smokers who have PTSD * Current use of other forms of nicotine delivery, such as nicotine patches or electronic cigarettes * Currently prescribed bupropion and/or varenicline