>> where? >> we're about 20 kilometers out. >> i think so. >> okay. >> we're going to meet the brilliant young woman who's been chosen to share the stage with mrs. obama tomorrow. >> high school valedictorian, karima took part in a u.s. program called tech girls. she wants to be an engineer. >> what's your thinking about why girls are less represented in the sciences? >> while growing up, the girl's always represented as the beauty. so they move towards art or music or literature. that was the stereotype that generalized every one. but girls started realizing that they have brains as well. and they will excel in math and science and technology. >> do you think you will be nervous when you're in the room with michelle obama? when i look at you you're so wonderfully poised and confident.