Obama, Clinton Go Hyper-Nuclear on National Security

He: Response ad to her new TV spot airing starting Saturday in Texas. She: Extended tough talk in Waco veterans speech. Obama campaign says in lightning-fast response ad: "When that call gets answered, shouldn’t the president be the one – the only one – who had judgment and courage to oppose the Iraq war from the start." Watch it above. Read script here. [youtube=http://www.youtube.com/watch?v=gTRfGZjPrrk&w=240] Clinton: "Sen. Obama says that if we talk about national security in this campaign, we're trying to scare people. Well, I don't think people in Texas scare all that easily." Says missed Obama votes on national security make him "missing in action." Watch video above. Read even more on Friday's back-and-forth here.