Sgt. John Flynn

Crowds At MetLife Stadium, Citi Field, US Open Moved By Emotional 9/11 TributesSgt. John Flynn of the NYPD was a first responder at the World Trade Center a decade ago. Watching the pre-game ceremony at Citi Field, he got teary. "How could you not?" he said. "It's just an amazing day, and it's a sad thing for everybody."