 Participation in this study will last about 28 months. All participants will first complete three assessment sessions that will include an interview about anxiety symptoms and medical history, self-report questionnaires, and a physiological evaluation. After the first interview, participants will be asked to rate their level of anxiety four times a day in a diary. They will continue with these daily diary entries through the completion of treatment. Once participants complete the first 2 weeks worth of daily ratings, participants will be assigned randomly to receive treatment with relaxation and self-control desensitization, CBT, or a combination of the two treatments. All participants will receive 14 weekly treatment sessions lasting between 1.5 and 2 hours each. During CBT sessions, participants will learn to identify ways in which they perceive themselves and the world and how to modify these thoughts to reduce anxiety. Applied relaxation and self-control desensitization sessions will teach participants relaxation techniques and the use of imagery for coping with anxiety. Between sessions, all participants will complete homework assignments that will involve practicing the approaches learned in sessions and continuing the daily diaries. 