On Saturday, December 3, 11 am, red underwear-clad runners will take part in a one-mile run across the Stone Arch Bridge to rally the fight to end the HIV epidemic and the stigma associated with the disease, and to raise awareness for World AIDS Day. The Red Undie Run is an annual community event, hosted by the Aliveness Project, Minnesota's leading organization for HIV services, advocacy, and education for people living with or at risk of HIV. The Run is…