Defense Secretary Ashton Carter testifies before the Senate Armed Services Committee about the U.S. military on Tuesday. Chip Somodevilla/Getty Images hide caption
Ashton Carter
Fighters from the Islamic State group parade in Raqqa, northern Syria. The U.S. is considering arming Arab and Kurdish fighters who are poised to attack the Islamic State stronghold. Uncredited/AP hide caption
U.S. Defense Secretary Ash Carter (center left) is greeted with a military honor guard as he arrives to meet Afghan President Ashraf Ghani at the Presidential Palace in Kabul, Afghanistan, on Saturday. Jonathan Ernst/AP hide caption
Vice President Biden swears in Ashton Carter, as the new Secretary of Defense's wife, Stephanie, holds the Bible for a ceremony in the White House Tuesday. Shawn Thew/EPA/Landov hide caption
Ashton Carter answers a reporter's question during a March 2013 news conference at the U.S. Embassy in Seoul, South Korea. Lee Jin-man/AP hide caption
Ashton Carter, President Obama's nominee to be the next secretary of defense, talks with Sen. Lindsey Graham, R-S.C., right, during a break in testimony before the Senate Armed Services Committee last week. The panel approved Carter's nomination Tuesday. J. Scott Applewhite/AP hide caption
President Obama announced Friday that Ashton Carter is his nominee to succeed Chuck Hagel as defense secretary. Larry Downing/Reuters /Landov hide caption
Ashton Carter answers a reporter's question during a March 2013 news conference at the U.S. Embassy in Seoul, South Korea. Lee Jin-man/AP hide caption