Peter Kassig was a 23 year old U.S. citizen who left his home to become an medical aid worker in Syria. He worked for the Syrian Revolution in Deir al-Zour, accompanying rebels and treated them when they were wounded. Kassig himself was wounded on one of his missions, but still provided medical support in Syria.
Despite his courage and good heart, ISIS captured him in Al-Raqqa almost a year ago, and today we saw him brutally slaughtered.