reflection and heroism. we begin, though, with nbc news rehema ellis. she wass there i should point t some 20 years ago covering the terrorist attacks and we are at thean pentagon ahead of the ceremony in just a couple of hours. let s start with rehe ma. the president is scheduled to arrive within a couple hours. walk us through what to expect, rehema. good morning, what you can expect is that 8:30 this morning, there will be a len e rendition of the national anthem. then at 8:46, there will be a city-wide moment of silence to mark the first moments when the planes struck the tower. at 9:03, another moment of silence to mark that moment when the second plane struck the south tower. there will also be the additional reading of names of nearly 23,000 people that died 20di years ago today. susan boyd was at that famous restaurant called the windows of the world. shere is a big sister of gordona