Chief Tayak and the Piscataway Nation of American Indians, who have lived in the Maryland-D.C.-Virginia area for 12,000 years, gives a blessing at the opening session of AIDS 2012, XIX International AIDS Conference in Washington, D.C.

Bill and Hillary Clinton, Sharon Stone, Kathleen Sebelius, Bill Gates and Elton John are a few of the headliners to speak this week at AIDS 2012, the XIX International AIDS Conference, which runs through July 27 in Washington, D.C.