Methods In order to achieve our objectives, we will utilize a randomized controlled trial, pre-post test design with the neighborhood as the unit of randomization and analysis. To avoid introduction of bias, COHO staff will maintain responsibility for all research and evaluation activities during pre and post test assessment. EMS will implement and maintain the POWER social marketing campaign in six intervention neighborhoods. CDC will serve as technical advisors to the project. COHO will first identify “high risk” neighborhoods in each study city that have higher than US average rates (as defined by the CDC, 2000) of Chlamydia and Gonorrhea combined with high concentrations of African American and Latina residents aged 15-25. We will then approach contacts in health departments and community organizations in each city and enlist their help in implementing a venue-based method for sampling hard-to-reach populations (more on this process described in the recruiting methods and selection of study population sections below). We will use this method to recruit participants for a cross-sectional, baseline study to document knowledge of, attitudes toward and use of female and male condoms. We will then randomly assign six neighborhoods to intervention status and six neighborhoods to control status. We will adapt the campaign for each city, and implement it in six intervention neighborhoods for nine months, and will complete a follow-up assessment similar to the baseline assessment, with added questions regarding exposure to the POWER campaign.