Stepping On The Glass

[The Blackangel]

I'm not Jewish, but respect Jews and Judaism. However there is are a couple questions that I have never been able to get a clear answer to, even when I google them. I've talked with the local rabbi, but he is from Israel and I just can't understand what he says due to his accent.

My question is, what does stepping on the glass at a wedding mean?
I'm also curious what a circumcision means. Like why is it a religious event?


I hope I'm not coming off offensive, as that is not my intent in any way. I'm just ignorant about a Judaism, thus I'm curious.