ALL-NEW MILITARY-INSPIRED COMPETITION SERIES “AMERICAN GRIT” TO DEBUT FOLLOWING RETURN OF “BONES” ON THURSDAY, APRIL 14, ON FOX BONES Kicks Off the Night at 8:00 PM, Followed By AMERICAN GRIT, Starring WWE® Superstar John Cena®, at 9:00 PM New military-inspired competition series AMERICAN GRIT will debut Thursday, April 14 (9:00-10:00 PM ET/PT),following the spring …