Workers hang a huge red ribbon on the North Portico of the White House one day ahead of World AIDS Day.
The event was organized by the Whitman-Walker Clinic and took place at 6 p.m. at Dupont Circle.
From 10 a.m. to 3 p.m. a mobile HIV testing bus was parked outside the Wilson Building. It provided free testing for anyone.
Other events Thursday included a cocktail party to benefit Whitman-Walker, a wine tasting event to raise money for research in northern Virginia, an open mic night organized by D.C.'s LGBT community will take place Friday night. There were also several religious services held throughout the city to mark the event.