530 US athletes will be participating at the 2012 London Olympics.
530.
530.
Yes, Brazil is competing in the 2012 Olympics.
Yes, Swaziland will be competing in the 2012 Olympics.
Yes, Aruba will be competing in the 2012 Olympics.
Yes, Azerbaijan will be competing in the 2012 Olympics.
Yes, Albania will be competing in the 2012 Olympics.
Yes, Andorra will be competing in the 2012 Olympics.
Yes, Argentina will be competing in the 2012 Olympics.
Yes, Australia will be competing in the 2012 Olympics.
Yes, Algeria will be competing in the 2012 Olympics.