Apple, which unveiled iOS 8 at June's Worldwide Developers Conference, says it will be technologically unfeasible for police to extract data from its new operating system. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

San Francisco Supervisor Scott Wiener (left) says he started taking a drug to prevent HIV infection earlier this year. Lisa Aliferis/KQED hide caption

itoggle caption Lisa Aliferis/KQED

Ukrainian President Petro Poroshenko, joined by Speaker of the House John Boehner and Vice President Joe Biden, acknowledges lawmakers' applause after addressing a joint meeting of Congress. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP