The State Department has confirmed that 25-year-old Anne Smedinghoff was one of five Americans killed in a car bomb blast in Zabul province, Afghanistan on Saturday. A native of Illinois, she was on a mission to deliver books to schoolchildren. Smedinghoff joined the Foreign Service three years ago after graduating from Johns Hopkins University.

While in Turkey, Secretary of State John Kerry mourned Smedinghoff's death. “We lost

a very bright and brave young woman, a young diplomat. We lost her to a horrific attack in Afghanistan. And today, our hearts are broken.”

Smedinghoff served as Kerry’s control officer during his visit to Afghanistan two weeks ago. She’s the first American diplomat killed on the job since last year's September 11th attack on the U.S. Consulate in Benghazi, Libya.

Fox News' Conor Powell reported, “Anne was a public affairs officer in Kabul working with journalists including myself and our entire Fox News team in Afghanistan. She also worked with Afghans putting an American friendly face to the civilian effort in that war torn country. […] Knowing her the little I did, she really did represent an America the way I think most Americans would want.”

Her family said in a statement that the world has lost a "beautiful soul."

Three U.S. service members, a U.S. civilian working for the Defense Department, and an Afghan doctor were also killed in Saturday's blast.

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