top step. and when it was over, prince charles clasped lady diana's hand reassuringly and unaffectedly. >> she was photogenic. she was young. she was beautiful. the world was in love with her. >> it was like a perfect love story, but behind the scenes a whole different story was playing out. a story of struggle. a story of a 19-year-old girl naive in this world trying to find herself. ♪ >> here at the bbc, we've mounted the biggest-ever outside broadcast. there are more than 60 cameras covering the proposal route. >> let's face it. the british know how to put on a big event like this. >> the date was getting nearer and nearer, and it was starting