>> reporter: ron mcneil headphone on the challenger before. he was the second african american in space inspiring americans with his saxophone playing with ro gravity. two years later he was gone in a national tragedy. challenger crew were pioneers. >> what was that like to having nation mourned with you? >> that was a beautiful part of coming back from this tragedy. >> reporter: she honors her husband by encouraging children to study science and technology. the same skills that helped a man from humbled beginnings see the earth from above. >> he described it as just so beautiful and appearing without judicial and or lines. peaceful he said. as he thought the lord meant for us to live. >> reporter: here on earth, words worth remembering. >> a candlelight vigil was held in ron mcnair's hometown. >>> tour guys in charleston have to spend hours learning history of the city. as it stands now, guys must past eight 200 question exam in order to be certified. people are suing think the city's licensable infringes upon rights of people who simply want