happening now right here on cnn. president obama you see there in memphis, tennessee right now to address graduates of booker t. washington high school. these are live pictures from the event. the school won the honor of having the president speak by winning this year's race to the top commencement challenge. the school boosted its graduation rate from 55% to 81%. over the last three years. while in the memphis area, the president will also take a look at the flood damage from last week. now a very special graduation moment. we don't usually spend time showing graduates walking across the stage, but one guy really caught our eye. his name is austin whitney. here he is getting his degree this weekend at the university of california at berkeley. austin is a paraplegic who wore a pair of mechanical legs to help him get out of his wheelchair so he could walk up and get his own diploma.