President Obama hosts leaders of the Gulf Cooperation Council at Camp David, Md., on May 14. The president gave assurances that the U.S. would support its allies in the region concerned over Iran's growing influence. Andrew Harnik/AP hide caption

itoggle caption Andrew Harnik/AP

Adm. Michael Rogers, NSA director and head of the U.S. Cyber Command, has avoided singling out China for blame in the OPM hack, which may affect as many as 18 million federal workers. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images