. >> nasa, the national aristotle national aeronautics and space administration presents a look back 2's encounter. >> i enjoy the actual interviews with the scientists. i find sometimes it is difficult because they tend to speak in very scientific terms. .o i use a narrator i use willard scott. >> are we going to do this first? >> i write his part sometimes in such a way that he is sort of explaining what the scientist says so that everybody can understand it. >> seat, this is something -- >> right, right. >> i do not have a scientific background. as a matter of fact, my major was art history, but i did get into the production area in puerto rico doing program for the university. so we use a lot of sound effects in our programs just to make the program more interesting. >> you are listening to the sounds of thousands of tiny particles. >> i was the first woman to ever do this job. and i found that a woman as well as a man can do a job which is so exciting, so challenging. so we are also doing a very important thing in terms of disseminating information not just about nasa, but about