bradley thompson, convention's production manager used the big screen to pop the question to laura bowmanwant to spend the rest of my life with you. >> unconventional proposal at the convention. there's one temptation maybe some republicans should resist, when it comes to dancing, they're no temptations joeanne moos, cnn, new york. >>> and happening now, dramatic rescues as isaac sparks a flooding nightmare in louisiana. and paul ryan's big night at the republican national convention. i'm wolf blitzer. you're in "the situation room." >>> seven years to today after hurricane katrina, isaac is inundating the coast with walls of water, posing a deadly threat that will last hours if not days. the storm was downgraded from hurricane to tropical storm just a couple of hours ago, but that reflects only the winds, and they're still near hurricane force. storm surge breached a levy in a parish. some sought shelter in attics as they await rescue. mississippi reports 50 rescued in that state. at last report, many without power. dusk to dawn curfew declared in new orleans starting tonight. let's get