>> a public water crisis. crews rush to fix a dam breached in south carolina deluge. and newly released video of a dramatic heist. thieves break in a jewelry store and trigger a massive police response in their get away. it's all "happening now". >> we begin with a little politics and the buzz surrounding vice-president biden and the run for the white house. >> is the vice-president going to run? >> you haven't heard that either? >> a super pac launches its first tv adand new polls show that the vice-president is favorite in match ups with the gop contenders.