Obama`s visit

Why Obama was so nice here in Brazil?Is that because he really likes us?Or maybe because he has some kind interest in something we have?
If we take a look in what is happening in the world today what we see?
We had a global financial crisis where the emerging countries saved the world from a collapse, we see the rise of societies in the middle east fighting for freedom and democracy and a natural disasters which had nuclear consequences...
From this we can get some explanations to the behavior from the Usa...they fear another world crisis, their energy suppliers are in the middle of a troubled situation and the world is doubting if the nuclear energy is safe enough...why he would come to Brazil?
Brazil is one of the most stable economies in the world nowadays, have found more petroleum fields to explore, has a very advanced research on the bio fuels and more important than everything, has no problems with no countries, it is a peaceful and a reliable State that is developing very quickly the economy and the society...