WASHINGTON – Science now has the tools to slash the spread of HIV even without a vaccine – and the U.S. is donating an extra $150 million to help poor countries put them in place, the Obama administration told the world's largest AIDS conference Monday.

"We want to get to the end of AIDS," declared the top U.S. HIV researcher, Dr. Anthony Fauci of the National Institutes of Health.

How long it takes depends on how quickly the world can adopt those tools, he said – including getting more of the millions of untreated people onto life-saving drugs that come with the bonus of keeping them from infecting others.