3, 2, one. oh my gosh. oh, wow. confirmation. bill: nasa spacecraft slamming into an asteroid last night. they did it on purpose. a test to see whether or not to protect earth someday in the event a collision could be coming our way. mike massimino, columbia professor for engineering and he does everything. hello to you. i wasn t quite sure what we were seeing from the image. explain to us and our audience. i was watching it live. what are we looking at? it became clear it was like a camera, dashboard camera on the spaceship that crashed into the asteroid. what you saw was the asteroid