At least 15 British residents are among the 38 killed, and that number is expected to rise
After Friday's deadly attack by a gunman in Tunisia, British Prime Minister David Cameron promises a "full-spectrum" response to ISIS extremism. At least 15 British residents are among the 38 killed, and that number is expected to rise. New images and footage of the rampage reveal more details of what happened. Charlie D'Agata reports from Sousse, Tunisia.
