strength, as partial remnants of isaac reemerge in the gulf of mexico. and, oops, a building implosion goes off without a hitch until a huge cloud of debris engulfs a crowd of onlookers. announcer: from nbc news, this is a special edition of today at the democratic national convention with matt lauer live from studio 1a in rockefeller plaza and savannah guthrie, live in charlotte, north carolina. and welcome to a special split edition of today on this thursday morning. good morning, i m savannah guthrie at the democratic national convention in charlotte. and i m matt lauer in new york. savannah, you look at that implosion video. someone clearly for got to do the old which way was the wind going? meanwhile president obama already had a lot of pressure on him with his speech tonight. now he s got a really tough act to follow after what was an enthusiastic and powerful endorsement from former president bill clinton. this was a speech that was supposed to last about 2