Athletics-Teen Lutkenhaus keeps meteoric rise on track with 800m US title
(In paragraph 1 removes incorrect reference to time being personal best) By Amy Tennery NEW YORK, July 26 (Reuters) - Teenager Cooper Lutkenhaus capped his summer school break in spectacular fashion on Sunday, the 17-year-old claiming the U.S. 800 metres title in 1:43.48 as his rapid rise continued. 
