What was the atmosphere like at the Aquatics Centre on Tuesday evening?
The building was jam-packed, the crowd was electric, the noise was consistently loud. And when American Michael Phelps swam the final 50 meters to complete the Americans' victorious 4x200-meter freestyle relay, the roaring crowd grew louder and louder with each stroke.
The final seconds were an amazing display of emotion from the fans, who knew they were witnessing history being made.