the keynote speech from julian castro mayor of san antonio. then first ly, michelle obama, making the case in primetime for four more years for the president. >> announcer: from nbc news, "decision 2012." the democratic national convention live from charlotte, north carolina. >>> good evening from charlotte, the arena home to the bobcats. tonight it is noisy and about the democrats. we get our first primetime glimpse of the message they have planned. days after tampa, 63 days until the election and a lot has changed as we said at the top of the broadcast since the days of hope and change, the last democratic convention in '0 #. tonight we hear from a man billed as a rising star, young mayor of san antonio and from a more established star, first lady, michelle obama. our team is in place for all of it including the largest fleet