We just learned that ISIS has beheaded a SECOND American journalist. Florida-native Steven Sotloff is the latest victim of the brutal murder. ISIS uploaded another video showing his gruesome death. He was the same American seen in the end of the first beheading video of James Foley. Now, the masked ISIS executioner says they will kill a British captive if the Western Allies don't stop the airstrikes. The ISIS killer spoke directly to Obama, saying, "Just as your missiles continue to strike our people, our knife will continue to strike the necks of your people." Sotloff was 31-years old. On his Twitter page, he jokingly called himself a "standup philosopher from Miami."