CNN) - In a new propaganda video released Sunday by ISIS, the group claims to have beheaded over a dozen members of Egypt's Coptic Christian minority on a Libyan beach. The video shows an apparent mass execution with jihadists in black standing behind each of the victims, who are all are dressed in orange jumpsuits with their hands cuffed behind them. The five-minute video, released by the terror group's propaganda wing al-Hayat Media, includes a masked English-speaking jihadi who says, "The sea you have hidden Sheikh Osama bin Laden's body in, we swear to Allah, we will mix it with...