Anniversary surprise caught on tape

The last video of Toni Henthorn was taken by friends during her husband's anniversary surprise -- soon she would be dead and he was the only witness

Christie Drews, a co-worker of Dr. Toni Henthorn, talks with "48 Hours" correspondent Peter Van Sant about Toni and the surprise her husband, Harold, planned for their 12th anniversary. Drews explains why the video is so precious to her and her co-workers.