Stones in Rio

The Rolling Stones are going to play a concert free to the public in Rio de Janeiro this weekend. The city is paying $750,000 for the concert and it is expected to draw the largest crowds for any concert in Rio's history- yes, it might even be larger than Rod Stewart's performance in '94 that attracted 3.5 million people. The concert is a week before Carnival begins (as I am sure we are all aware of) and seems like it would be a lot of fun. Field trip to Rio anyone????