Apparent ISIS executioner: 'I'm back, Obama'By Dana Ford, CNNUpdated 4:09 AM ET, Wed September 3, 2014Just WatchedAnalysis of the ISIS beheading videosreplayMore Videos ...Analysis of the ISIS beheading videos 02:23Story highlightsThe U.S. intelligence community is analyzing the latest videoISIS videos of journalists' beheadings are strikingly similarThey appear to be shot in the same place, with the same executionerThe videos fade to black at certain points in productionThe similarities are striking.An American journalist kneels in the desert, dressed in an orange prison-style jumpsuit. A masked "executioner" lords over him, wielding a knife.The journalist speaks; the executioner speaks. And then the horrific happens: the victim is beheaded."It is almost the exact same choreography," said Peter Neumann, a professor at King's College London, comparing ISIS videos showing the deaths of American journalists Steven Sotloff and James Foley. Just WatchedIs the U.S. safe from ISIS?replayMore Videos ...Is the U.S. safe from ISIS? 02:38PLAY VIDEOJust WatchedISIS blames Obama for Sotloff beheadingreplayMore Videos ...ISIS blames Obama for Sotloff beheading 00:34PLAY VIDEOThe executioner appears to be the same person. The location of the two killings also appears to be similar.Neumann suspects they took place in or around the Syrian city of Raqqa, one of the safest areas for ISIS, which calls itself the Islamic State."It's titled 'A Second Message to America,' and it basically contains exactly the same message," Neumann said about the Sotloff video, which was posted Tuesday.A video of Foley's execution was released last month.The executionerSotloff's apparent executioner speaks in what sounds like the same British accent as the man who purportedly killed Foley. He's dressed identically in both videos, head to toe in black, with a face mask and combat boots. He appears to be of similar build and height. He waves a knife in his left hand, as did the militant in the video of Foley's death.And then, there are his actual words. "I'm back, Obama, and I'm back because of your arrogant foreign policy towards the Islamic State," the executioner says in the second video. "Just as your missiles continue to strike our people, our knife will continue to strike the necks of your people."Obama on ISIS in Syria: 'We don't have a strategy yet' At the end, the video threatens the life of a British captive, just as the Foley video threatened Sotloff's life.The SITE Intelligence group says there's no question the same masked fighter appears in both videos.Adds CNN's Karl Penhaul, "He certainly wants us to think that he is the very same man." Following Foley's death, the British ambassador to the United States said that experts in his country were close to identifying his killer. He has not yet been named.QuestionsThe U.S. intelligence community is busy analyzing the Sotloff video to try to answer some key questions: When it was shot? Where was it shot? Is the killer the same as the one in the Foley video?Just WatchedMarie Harf: ISIS shows barbarismreplayMore Videos ...Marie Harf: ISIS shows barbarism 01:50PLAY VIDEOJust WatchedISIS recruits young children in video replayMore Videos ...ISIS recruits young children in video 01:37PLAY VIDEOThe administration does not want to speculate on specifics of the video until those questions can answered, a senior official told reporters.Paul Ginsberg, a forensic audio and video expert, said analysts will comb through every inch of the video, "analyzing the electronic impulses, the audio, the video, the speech, voice identification, the geography -- for whatever information it can provide -- as well as the production techniques."U.S. analysts have said it's not possible to know from the first video who beheaded Foley because the entire slaying is not shown. A man moves a knife across Foley's neck, then the picture fades to black.Kerry: 'The cancer of ISIS will not be allowed to spread'One forensics expert has raised the issue that there appear to be two militants in the video. The second militant appears on the video after an obvious edit."There's definitely a change of actor," said Ross Patel, the forensics expert. "There are noticeable -- there are subtle -- but there are also noticeable changes in their build, their physical appearance."The man who speaks, holds a knife in one of his hands. It looks to be a different knife than the one that was left next to Foley's body.Also, the dimensions and style of the knives are slightly different, Patel said. In the Sotloff video, the picture fades to black immediately before and after the start of the beheading so, again, it's not immediately clear whether the man speaking is the same man who then killed the journalist.Who is ISIS?ISISISIS governor killed in airstrikes The latest ISIS-appointed governor of Mosul was killed in coalition airstrikes on Christmas Day, according to Iraqi police. Author's journey inside ISISAuthor Juergen Todenhoefer says ISIS are "more dangerous than people realize."The Pentagon has a new name for ISISThere's yet another new name for ISIS among those fighting against the terror group. Daesh. FBI warns military of ISIS threatThe FBI warns U.S military that ISIS are looking for individuals who may be interested in carrying out attacks on home soil.Iraqi army's 'ghost' soldiersIraq's Prime Minister says there is evidence of 50,000 soldiers being paid while inactive.Pentagon insider may lead war on ISISPentagon insider Ashton Carter is expected to be President Barack Obama's nominee for Defense Secretary.U.S. seeks strategy reviewWolf Blitzer talks to Rep. Ed Royce about the White House's new ISIS strategy that involves removing Bashar al-Assad.Child fighter tormented by ISIS Just two weeks ago, Yasir was regularly strapped into an explosive vest and handed guns and a radio to stand guard at an ISIS base in Syria.Jihadi Janes try to join ISISHow did three U.S. teenagers become radicalized? CNN's Pamela Brown reports.Why is ISIS so attractive to recruits?Reza Aslan examines the appeal of ISIS and why the group is able to successfully attract so many recruits.This is how ISIS indoctrinates kids CNN's Nick Paton Walsh takes a look at how ISIS is using media to desensitize children. Travel ad or pro-ISIS video?A new propaganda video from ISIS features a Canadian ISIS member who died in combat.ISIS: Everything you need to knowExplore CNN's interactive that explains ISIS' roots, what it controls, and where its support comes from.More from middleeastWho is Jordanian pilot Moaz al-Kassasbeh, captured by ISIS?Father of American killed in Libya says son was a patriotISIS' Japanese hostage video raises new questions about 'Jihadi John'