Stockholm Sweden, the fifth stop on this year’s Diamond League calendar. On a day when Mondo Duplantis was supposed to reign supreme before the home crowd, it was Audrey Werro, Cooper Lutkenhaus, and the 800m that took center stage! First Mondo did make history, losing for the first time since 2023, ending a 40 meet winning streak, after clearing only 5.80m. That was NOT the biggest news of the day however, as the 800m stole the spotlight from Mr Duplantis.  First was seventeen year old Cooper Lutkenhaus, the youngest ever world indoor champion in the 800m. Fresh off finishing his junior year in high school, Cooper headed to Sweden for…