>> as you're getting out through the window, you're feeling a little nervousness. once you're out there, it's the awe of realizing that you're sitting on ropes, that there's nobody else up there with you except for the three on the other side and that you're on the national washington monument. nobody gets to be up there. that's just an awe-inspiring moment. >> the engineers have a rare bird's-eye view of the nation's capital. >> one thing we got to watch was the president flying through. we all waved at him. >> but eric and his colleagues don't have much time for sight-seeing. they have work ...