NAIROBI, Kenya -- Promiscuity and other risky sexual behavior must change to stop the spread of AIDS in Africa, Secretary of State Colin Powell said Saturday.

Young Kenyans, including an 11-year-old girl, had a frank discussion with Powell about promiscuity, resistance to condoms and the cultural expectation that young girls will have sex with much older men.

"Those sorts of patterns of behavior have to change to protect young people," Powell told the gathering.