WASHINGTON (Agencies) - US President-elect Barack Obama has said that the suicide bombers have remained and would always remain a danger and challenge to the United States. The President-elect also voiced fear that Mumbai-type attacks can be replicated by terrorists in other parts of the world, including the US and said his administration will focus on putting more pressure on "our major target" Al-Qaeda. The "danger is always there" to have a Mumbai-type attack in an American city, he maintained. Speaking in general terms in an interview with ABC's This Week programme broadcast Sunday, Obama said the US is safer today after the Sept 11 attacks, but dangers persist. He said national security remains a concern, but added: "We know exactly what they're planning, where they're positioned. If you have a small group of people in today's world with today's technology who are intent on doing harm and are willing to die, that is something that's always going to be a challenge." Obama vowed to take swift action on the Middle East peace process and Iran's nuclear ambitions but played for time to shut down the Guantanamo Bay prison camp. He said he expected to "move swiftly" to engage Iran, whose nuclear quest he said would be one of his administration's biggest challenges. He said that he will take a new approach towards Iran that will both emphasize respect for its people and spell out expectations for its leaders. He also promised a new emphasis on being willing to talk, but also a clarity about what our bottom lines are, and "we are in preparations for that. We anticipate that we're going to have to move swiftly in that area." "I think that homeland security always has to be our number one priority. When I set up the hierarchy of things that I've got to do, my number one priority every single day that I wake up is how do I make sure that the American people are safe. We are going to have to stay vigilant and that's something that doesn't change from administration to administration. When you see what happened in Mumbai that potentially points to a new strategy, not simply suicide bombings but you have commanders taking over," Obama said when asked about homeland security. "I think that the dangers are always there and I think you have to anticipate that having seen the mayhem that was created in Mumbai that there are going to be potential copycats or other terrorist organisations that think this is something they can replicate," he said. "And so we're going to have to be vigilant in terms of our intelligence, we're going to have to make sure that we are more effective in terms of anticipating some of these issues and we've got to continue to put pressure on Al-Qaeda, which is our major target. That has to be one of our primary areas of focus when it comes to our international security." "I think that Iran is going to be one of our biggest challenges. And as I said during the campaign, you know, we have a situation in which not only is Iran exporting terrorism through Hamas, through Hezbollah, but they are pursuing a nuclear weapon that could potentially trigger a nuclear arms race in the Middle East," Obama said in an interview with ABC's This Week programme broadcast Sunday. In a shift from President George W Bush's policies, Obama has said he would seek much broader engagement with Iran. "We are going to have to take a new approach. And I've outlined my belief that engagement is the place to start," he said. On Middle East, Obama defended his reluctance to speak out on Israel's bloody offensive in the Gaza Strip before he succeeds Bush on January 20. He said he was building a diplomatic team so that "on day one, we have the best possible people who are going to be immediately engaged in the Middle East peace process as a whole." The team would "be engaging with all of the actors there" so that "both Israelis and Palestinians can meet their aspirations," Obama said. Until then, he said again that he would leave the Bush Administration to speak on foreign policy but indicated some continuity to the peace process. Obama stood by his words of July, during a visit to Israel, when he had said: "If somebody was sending rockets into my house where my two daughters sleep at night, I'm going to do everything in my power to stop that. I would expect Israelis to do the same thing." Asked by ABC if he would repeat the remark in Israel now, he said: "I think that a basic principle of any country is that they've got to protect their citizens." When asked about his promise to shut down the controversial prison at Guantanamo Bay, which still holds some 250 "war on terror" suspects, Obama reiterated his vow to close the prison but acknowledged it might not happen within his first 100 days in office. "It is more difficult than I think a lot of people realise - and we are going to get it done - but part of the challenge that you have is that you have a bunch of folks that have been detained, many of whom who may be very dangerous who have not been put on trial or have not gone through some adjudication," he said. The president-elect said that while some evidence against terrorism suspects may be tainted by the tactics used to obtain it, that doesn't change the fact they are "people who are intent on blowing us up." "I think it's going to take some time and our legal teams are working in consultation with our national security apparatus as we speak to help design exactly what we need to do," Obama said. But Obama added emphatically that the base would be closed. "I don't want to be ambiguous about this. We are going to close Guantanamo and we are going to make sure that the procedures we set up are ones that abide by our constitution," he said, vowing also that his administration would not torture terror suspects. US President-elect Barack Obama said he was not ruling out possible prosecution for abuses committed under the George Bush Administration, saying no one "is above the law". "We're still evaluating how we're going to approach the whole issue of interrogations, detentions, and so forth," Obama said in the interview when asked about alleged abuses under Bush. "Obviously we're going to be looking at past practices and I don't believe that anybody is above the law," Obama said. But Obama added that he wanted his administration to focus on tackling problems moving forward, rather than reviewing policies under his predecessor. Obama criticised Vice-President Dick Cheney for his public defence of "extraordinary" interrogation methods used against top terrorism suspects, including simulated drowning known as waterboarding. "I have said that under my administration we will not torture." He declined to say whether he could appoint a special prosecutor to look into possible charges against Bush and his deputies, saying the issue would be up to his attorney general. On US economy, Obama said he would not try to dictate to lawmakers the details of an economic stimulus package but would work closely with them to hammer out a plan. He said he wants more transparency and strict guidelines for using the second $350b of the bailout fund Congress approved last fall to stabilise the nation's financial system. Obama declined to say whether he wants President George W Bush to request the rest of the money, but he said he has asked his economic team to develop a set of principles to ensure more openness about how the money is spent and to focus on using it more to help homeowners and small businesses. In the interview taped Saturday, Obama also conceded it will be difficult to enforce his pledge to ban congressionally earmarked projects from the nearly $800 billion economic stimulus plan he's negotiating with Congress.