The first gold medal will be awarded on Saturday in shooting and all eyes will be on American swimming star Phelps when he returns to the pool in the first week .
American swimming star Phelps is the most decorated Olympian in history .
The first gold medal will be awarded on Saturday in shooting and all eyes will be on American swimming star Phelps , the most decorated Olympian in history , when he returns to the pool in the first week .