Presenters Discuss: the factors in generating high HIV counseling and testing demand and acceptance in a conservative, Somali ethnicity, Islamic context (East Africa); a methodology for conducting survey research with a highly mobile, most at risk population, street youth's barriers to accessing HIV testing and treatment, and the key needs of street youth in Ukraine for mitigating their risk behaviors and linking them into HIV prevention, treatment, and care (Kyiv, Odesa, and Donetsk, Ukraine); and how mobile HIV counseling and testing services (MCT) in Ethiopia reached key populations at risk through partnership with local communities, and how effective the MCT service has been in reaching populations at higher risk for HIV infection (Ethiopia).