(April 6, 2016, 12:42 PM EDT) -- PHILADELPHIA — A banquet manager who was fired after multiple conflicts with her supervisors failed to show that she was the victim of age discrimination, the Third Circuit U.S. Court of Appeals ruled April 1, affirming a trial court’s summary judgment ruling (Lisa Mercantanti v. WCI Operations LLC, No. 15-1866, 3rd Cir.; 2016 U.S. App. LEXIS 5988)....