what do people rib him about at sandhurst, being a royal. >> being a royal.s. >> reporter: you call him harry potter? >> sometimes. >> reporter: lieutenant mills had described an impressive fellow cadet to me. but this was also a period in prince harry's life when he made mistakes. in public. there were stories of drug taking. and heavy drinking. there were stories of brawling outside nightclubs. >> this is the first time i've ever seen prince harry. it's the first time i've ever photographed him. i was quite shocked, in fact. >> reporter: not forgetting the infamous occasion he went dressed as a nazi to a fancy dress party. >> it's another royal mess. once again, it's prince harry who's in the firing line. >> reporter: that earned him a rebuke from some of the country's senior politicians. >> the prince is showing such immaturity. >> i think a public apology is appropriate. >> i think this is all part of him growing up, learning, perhaps not being aware of how much the media were going to scrutinize him. i think that probably is harry of the past. we haven't