AIDS conference in Washington DC

The world's largest AIDS conference returns to the United States for the first time since 1990.

People look at quilts in memory of AIDS victims at the "Keep the Promise" rally of AIDS advocates in Washington on July 22. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, a leading U.S. expert in the AIDS pandemic, said there is "no excuse" scientifically for not putting an end to the disease that has killed some 30 million people since it emerged in the 1980s. Speaking to reporters on the first day of the International AIDS Conference in the nation's capital, Fauci said science has the tools needed to combat HIV/AIDS.

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U.S. Secretary of State Hillary Clinton speaks during the 19th International AIDS Conference in Washington D.C.

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Geojina Gutierrez, right, of Mexico City walks in the AIDS March in Washington, D.C., on July 22.

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British pop icon Elton John walks to the podium to read names appearing on the AIDS Quilt on the National Mall on July 23 as part of the 19th International AIDS Conference in Washington, D.C. The conference is expected to draw 25,000 people, including politicians, scientists and activists, as well as some of the estimated 34 million people living with HIV who will tell their stories.

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Adrian Gonzalez, an employee of the Condom Project, sets up a display at the International AIDS 2012 Conference in Washington, D.C., on July 23. The Condom Project (TCP) was established by a group of AIDS educators, activists and artists who work to de-stigmatize condoms among all people and to increase their use among sexually active individuals.

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Co-founder and Chairman of the Bill and Melinda Gates Foundation Bill Gates speaks alongside World Bank President Jim Yong Kim during the 19th International AIDS Conference in Washington, D.C. on July 23.

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Sex workers from around the world attend the Sex Workers' Freedom Festival in Calcutta, India, on July 22. Sex workers and social activists from 42 countries are congregrating in the city to participate in the weeklong festival organized to protest against the U.S. government's travel restrictions on sex workers wanting to attend the Intenational AIDS Conference in Washington, D.C.

Dibyangshu Sarkar / AFP

HIV-positive patient Aaron Laxton of St. Louis, center right, and other activists participate in a march from the Washington Convention Center to the White House on July 24, in Washington, D.C. AIDS activists from organizations all around the world participated in the march to "demand rights and resources to confront and cure HIV/AIDS."

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AIDS activists tie money and pill bottles to the White House fence.

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AIDS activists are arrested by U.S. Park Police in front of the White House after marching from the 19th International AIDS Conference in Washington, D.C.

Shawn Thew / EPA

Bob Bowers of Madison, Wis., weeps as names of AIDS victims are read aloud at the AIDS Memorial Quilt on the National Mall in Washington, D.C. on July 24. Bowers, who has been HIV positive for 30 years, has lost dozens of friends to AIDS.

Kevin Lamarque / X00157

Timothy Ray Brown, left, known as the 'Berlin Patient,' is the only person to have been cured of AIDS. He is greeted while waiting to enter a press conference to announce the launch of the Timothy Ray Brown Foundation at the Westin City Center hotel in Washington, D.C. "I wouldn't wish this on my worst enemy," Brown said of the treatment process that eventually cured him.

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Thousand of activists, sex workers and their children -- with many of them carrying symbollic red umbrellas -- attend a rally as a part of the International AIDS Conference organized by the Durber Mahila Samannay Committee in the Sonagachi redlight district in Calcutta, eastern India. A six-day conference is being held in Calcutta with hundreds of sex workers gathering from 30 countries to oppose the U.S. decision to not grant them travel visas.

Piyal Adhikary / EPA

Children of Indian sex workers gesture as they participate in a rally as part of the Sex Workers' Freedom Festival in Calcutta, India.

Dibyangshu Sarkar / AFP