HIV-AIDS is affecting black gay men in the United States on a scale unseen among any other group in the developed world, said a report issued Wednesday ahead of the International AIDS Conference. So grave is the crisis that in some US cities, one in two black men who have sex with other men are HIV positive, according to the report from the Black AIDS Institute, the only national HIV-AIDS think tank focusing on African Americans. "AIDS in America is a black disease, no matter how you look at it," its president and chief executive Phill Wilson, who is himself...