Journalist James Foley killing: President Obama statement
20 August 2014 Last updated at 17:41 BST
President Barack Obama gives a statement following the killing of US journalist James Foley.
The White House has confirmed that a jihadist video showing the beheading of Mr Foley is authentic.
The Islamic State (IS) group released the video on Tuesday, saying Foley's killing was revenge for US air strikes on its fighters in Iraq.