Democratic White House hopeful Barack Obama, looking to chart a US foreign policy course far removed from the Bush administration's path, said he would bring Osama bin Laden to justice in a way that would deny the al-Qaida leader the chance to become a martyr. Obama's comments Wednesday, following a meeting with his new team of national security advisers, marked another push by the first-term Illinois senator to battle criticism by presidential rival John McCain and other Republicans that he lacks the national security expertise needed to become president. McCain has highlighted his own experience as a longtime senator and former prisoner-of-war in Vietnam. Obama told reporters that if bin Laden were found during his watch, he would bring him to justice in a way that would not allow the terrorist mastermind to become a martyr, but he may be killed if the US government finds him. "First of all, I think there is an executive order out on Osama bin Laden's head," Obama said at a news conference. "And if I'm president, and we have the opportunity to capture him, we may not be able to capture him alive."