'It's especially tragic that Chris Stevens died in Benghazi because it is a city that he helped to save,' Obama says - broadcast
'We will work with the Libyan government to bring to justice the killers who attacked our people,' Obama says in broadcast
Clinton says it is especially painful that Libya attack took place on Sept 11 - via broadcast
'Violence like this is no way to honor religion or faith,' US Secretary of State Clinton says about Libya attack - via broadcast