Just had a look at the teams and the splits from the heats. The USA went without their 3 fastest swimmers in the heat and they can probably improve dramatically tonight. Their 1st leg was a disappointing 49.93. Jason Lezak will probably do at least 1 1/2 seconds better than that for a start, and with the addition of Crocker and Phelps, I'm almost certain the US will break the world record. The only question is how fast can the South africans go?