The last time I was flying back from SA, I had a layover in Miami to get back to Canada. I had to pick up my baggage, go through customs, and then check my baggage and go through security again. It was a retarded system and needlessly stressful because the layover was barely long enough to get through on time. What's the experience going the other way? If I'm flying from Toronto->Miami->S.America, do i have to go through Customs in Toronto (presumably yes), then go through again in Miami because their airport is retarded and you can't transfer to a different flight w/o going through the same areas as people that haven't already been screened once? Or is it more like JFK where because you're only passing through, there's not much extra security? Need to figure out what will be the least aggravating way to get down there taking into account travel time and airport hassles.