 Then police and security locked the venue down, leaving throngs of fans with tickets in a crush outside. The fundraising arm for the U.S. Olympic team is revving up for a donation drive aimed at raising $500 million by the time the Summer Olympics return to Los Angeles in 2028. Organizers hope to use the momentum of this year's Olympics, which begin July 26th. Unlike most Olympic teams, the U.S. team does not receive government funding and relies mainly on fundraising.