Participants in an ethical hacking contest at a Swiss security conference in Geneva in March. So-called bug bounty programs are becoming very popular in Silicon Valley's high-tech sector.
Salvatore Di Nolfi/EPA/Landov
Air Force personnel put up tents to house a 25-bed, U.S.-built hospital for Liberian health workers sick with Ebola in Monrovia, Liberia's capital. The hospital is scheduled to open this weekend.
John Moore/Getty Images
Brazil's judicial system faces a massive backlog of cases — and stacks of paperwork. One group of five judges in Sao Paulo is currently handling 1.6 million cases.
G Dettmar/National Council of Justice