In Iraq, there's been no let-up in sectarian violence in Baghdad. Today, there were bombings and shootouts in relatively peaceful cities in northern and southern Iraq. Is it time to divide the country along sectarian lines? Also, investigative reporter Seymour Hersh on whether Washington saw the war in Lebanon as a test for attacking Iran. Plus, how President Bush and Iran's Ahmadinejad see Hezbollah's stand against Israel, and how the Democrats hope to use national security in November's election.