Katie Couric: What one personal flaw do you think might hinder your ability to be president?
Sen. Barack Obama: I don't think ... there's a flaw that would hinder my ability ... to function as president. I think that all of us have things we need to improve.
Sen. John McCain: You know I'm not an objective observer. I think that would have to be to make sure that I don't make any decisions that are not fully informed by every source of information that's credible I can possibly get.