Barack Obama's remarks at the Summit on Countering Violent Extremism at the State Department in Washington, D.C., obamawhitehouse.archives.gov. February 19, 2015.
"Full Transcript: President Obama Speaks Exclusively to George Stephanopoulos on 'This Week'". "This Week" with George Stephanopoulos, abcnews.go.com. September 15, 2013.