Defense Secretary Ash Carter waves as President Barack Obama departs, following a visit to the Pentagon, July 6, 2015. Obama met with Carter and his national security team and hosted a news conference with reporters. Defense Secretary Ash Carter waves as President Barack Obama departs, following a visit to the Pentagon, July 6, 2015. Obama met with Carter and his national security team and hosted a news conference with reporters. SHARE: Download: Full Size (0.926365 MB) Tags: Photo Essays Credit: VIRIN: 558518-E-STO99-345.jpg Photo Gallery