To clear up internet rumors that it was "Omaha Beach's" trainer Richard Mandella who noticed

THE BROKEN CANNON BONE on "Omaha Beach" prior to today's Pegasus World Cup where he was scratched (dropped out) despite AGAIN being the favored horse to win, it was in fact The Stronache Group Vet who made the discovery as cited by BloodHorse...#FinalBoss #OneLove XOXO

https://www.bloodhorse.com/horse-racing/articles/238108/omaha-beach-scratched-from-pegasus-world-cup