Kids, behave now.
This is a great event, and it is fantastic that there is an international involvement. But it is a US based organization, being held on US soil. And this year, more than anytime in my memory (and I am an old guy) patriotism is running high - and I think that is great.
PS - we had a US flag, and a Canadian flag, on our robot thru the entire event. Would have had a Brazilian one but we couldn't find one.!!!!