We arrived safe and sound after four flights and 21 hours in the air. Highlights had to be flying over the Andes between Santiago and Sao Paulo - wow! - and seeing Sao Paulo from the air at night: the lights below the stars of 18 million residents in this vast, flat city. Here we are with Carlos and our host families on our arrival at Ribeirao Preto, where we'll be for the next six nights.