U.S. Tests Teens A Lot, But Worldwide, Exam Stakes Are Higher

Hoskins in one of his most memorable roles, detective Eddie Valiant in Who Framed Roger Rabbit. Buena Vista/Getty Images hide caption

Twitter CEO Dick Costolo says the company has to bridge the gap between the brand's global awareness and user engagement. Ethan Miller/Getty Images hide caption

After the University of Michigan increased its efforts to prevent sexual assaults on campus, reports increased by 113 percent. Erin/Flickr hide caption

Andy Leer of maker space chain TechShop calibrates a 3-D printer at a GE-sponsored pop-up workshop in Washington, D.C. Maker spaces, which offer access to industrial-grade tools, are attracting support from governments and big companies like Ford and Lowe's. Gary Cameron/Reuters/Landov hide caption

Computer hacking experts from the National Security Agency and various branches of the U.S. armed services try to break into remote networks set up by competing U.S. military service academies. The hackers'€™ war room is in a building in Columbia, Md., owned by Parsons, a U.S. defense contractor. David Welna/NPR hide caption

Students in Manchester, England, celebrate the results of their college entrance exams. Christopher Furlong/Getty Images hide caption

Los Angeles Clippers owner Donald Sterling (center) has been banned by the NBA; he is seen here watching a Clippers game with V. Stiviano in 2011. Danny Moloshok/AP hide caption