President Obama pays tribute to Americans killed in Libya
The bodies of the late US ambassador Chris Stevens and three of his colleagues who were killed this week in Benghazi in Libya have been flown back to the United States.
Ambassador Stevens and his staff died after gunmen stormed the US consulate amid protests over an anti-Islamic film.
President Obama paid tribute to the four, calling them "patriots who embodied the American ideal". Mr Obama repeated his vow to bring to justice those who carried out the attack.