Biden's warning to ISIS militants: 'We will follow them to the gates of hell'By Ashley Killough, CNNUpdated 6:26 PM ET, Wed September 3, 2014Just WatchedBiden: We'll follow ISIS to 'gates of hell'replayMore Videos ...Biden: We'll follow ISIS to 'gates of hell' 01:50Story highlightsOf the U.S. journalists' killers, vice president says, "We will follow them to the gates of hell""Because hell is where they will reside," he added. "Hell is where they will reside"Biden referenced 9/11 and the Boston bombings as examples of American resolveVice President Joe Biden on Wednesday issued a sharp warning to ISIS militants, saying after the United States is done grieving the death of two American journalists, their killers will have to answer for their actions. "They should know we will follow them to the gates of hell until they are brought to justice," he forcefully told an audience at an event on the New Hampshire-Maine border. "Because hell is where they will reside. Hell is where they will reside."Biden opened his remarks in memory of Steven Sotloff, the journalist who was beheaded by ISIS militants Tuesday, two weeks after James Foley was executed in the same horrific manner on video. Foley was from New Hampshire, while Sotloff lived there for boarding school.ISIS video shows beheading of American journalist Describing the perpetrators as "barbarians," Biden vowed that Americans would not be frightened or intimidated by the heinous acts. Just WatchedAuthorities close to naming ISIS militantreplayMore Videos ...Authorities close to naming ISIS militant 02:05PLAY VIDEOJust WatchedRemembering Steven SotloffreplayMore Videos ...Remembering Steven Sotloff 02:45PLAY VIDEOJust WatchedISIS blames Obama for Sotloff beheadingreplayMore Videos ...ISIS blames Obama for Sotloff beheading 00:34PLAY VIDEO"We came back after 9/11. We dusted ourselves off and we made sure that Osama bin Laden would never, ever again threaten the American people," Biden said. "We came back Boston strong, blaming no one but resolve to be certain that this didn't happen again.""As a nation, we're united, and when people harm Americans, we don't retreat," he later said. "We don't forget."ISIS executions heighten fears for Western hostagesThe vice president, who's mulling a 2016 presidential bid, made his remarks at the Portsmouth Naval Yard in a speech about the economy. He was accompanied on stage by U.S. Sen. Jeanne Shaheen, a New Hampshire Democrat who's running for re-election this year.Previewing Biden's trip, the campaign for former Republican Sen. Scott Brown, who's challenging Shaheen for her seat in this year's midterms, released a Web video that shows footage of the vice president supporting President Barack Obama's foreign policy, an agenda the Brown campaign labels a "failure." 'Degrade and destroy'After Sotloff's killing, Obama faced a chorus of bipartisan calls from Congress to act more aggressively and come up with a concrete strategy to combat ISIS, beyond the already ongoing targeted air strikes. Speaking Wednesday, Obama addressed his much criticized statement last week that he has no strategy on ISIS. He said he was referring to a military strategy in Syria that "might" require congressional approval."Our objective is clear. That is to degrade and destroy (ISIS) so it's no longer a threat," he said. "We can accomplish that. It's going to take some time, it's going to take some effort."Obama: U.S. won't back down to ISISThe president said the world needs a regional strategy to defeat the group."We've been putting together a strategy that was designed to do a number of things... What we have to make sure is we have a regional strategy in place," he said.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 politicsClinton to announce sooner rather than later as GOP takes aim at her family's foundationWhite House warns Netanyahu not to reveal Iran detailsObama warns cop body cameras are no 'panacea'