TOKYO (Reuters) -When Cooper Lutkenhaus talked about how he developed his 800 metres tactics "at a younger age" on Friday it brought a ripple of laughs from his U.S. team mates wondering just how far back the 16-year-old sensation was reaching.
Lutkenhaus is about to become the youngest American to compete at a world championships, but looked and sounded as poised as 34-year-old pole vaulter Katie Moon sitting alongside him at a press conference at Tokyo's Olympic Stadium.
