Book excerpt: HOW A MARATHON INSPIRED A CALL TO PURPOSE On the outside, I was like every other 4-year-old. I had no idea what cancer was, or the real reason my parents had uprooted our family and moved to America. They did it for me, to find a cure before it was too late. So begins a personal journey decades in the making. Author Bishoy Tadros has faced seemingly insurmountable setbacks and impossible odds--from his childhood bout with acute lymphoblastic leukemia to crossing the finish line in Central Park competing in the TCS New York City Marathon. Break Barriers is a story about uncovering your potential, even if you are the underdog. It's about learning to apply the virtues of patience, perspective, and purpose to achieve whatever you dream in life. Bishoy's message is a reminder that your comeback will always be stronger than the original setback.