Penn Square is pictured on an early Sunday morning from my room at the Lancaster Marriott Hotel. so much depends upon a cooling device affixed to myfather in the operating roomtheatre (With apologies to William Carlos Williams) Story, photos by Sharon Kozden On an otherwise ordinary weekend in 2012, my father walked a short distance on a treadmill before failing miserably his cardiac stress test. He was subsequently hospitalized and scheduled for double-bypass surgery on Monday with a cardiothoracic surgeon who shared his Polish ancestry. That weekend, however, Dr. Ray Singer (of Jewish descent) was the attending surgeon. I remember sitting in a sterile hospital room with my dad—he of…