Participants arrive at Campus Party, a technology festival held in Sao Paulo, Brazil, on Jan. 31, 2017. Campus Party is a one-week annual technology festival that brings together hackers, developers, gamers and computer geeks. According to the organizers, the event expects to receive until Feb. 5 approximately 9,000 visitors, of whom 8,000 will be camping at the site. (Xinhua/Rahel Patrasso)
