Victory for New Zealander in Famous American Race

Scott Dixon has created history, becoming the first New Zealand driver to win the Indy 500 at the Brickyard:

http://home.nzcity.co.nz/news/article.aspx?id=85629&fm=psp,tst

This is one of the world's most famous car races.

Do you have a favourite motorsport event? If so, what and why?