Ed and Mary Kassig plead for ISIS to release their hostages . Abdul - Rahman Kassig served as a U.S. Army soldier and went to Syria as an aid worker . aid worker Dr. Shameela Islam-Zulfiqar said . He was featured at the end of an ISIS video depicting the beheading of Michael Henning . Henning was a ` ` local and national hero , '' a joint statement from 200 mosques says .
Ed and Mary Kassig plead for ISIS to release their hostages . Abdul - Rahman Kassig served as a U.S. Army soldier and went to Syria as an aid worker . He was featured at the end of an ISIS video depicting the beheading of Michael Henning . Henning was a ` ` local and national hero , '' a joint statement from 200 mosques says .