For me, this is not just a matter of policy, it's personal. I stood next to President Obama as the Marines carried those flag-draped caskets off the plane at Andrews. I put my arms around the mothers and fathers, the sisters and brothers, the sons and daughters, and the wives left alone to raise their children.
"It has been one of the great honors of my life to lead the men and women of the State Department and USAID," she added.
Chris Stevens, the U.S. ambassador to Libya, was one of four Americans killed in the September attack on the consulate in Benghazi.