Looking at him today, you'd never guess my brother was born with Transposition of the Great Arteries (TGA)-a serious congenital heart defect where the aorta and pulmonary artery are swapped, sending oxygen-deprived blood back to the body instead of the lungs.

Yet, he continuously defies the odds. Through mud runs, high-level calisthenics, and an unrelenting drive to push his limits, he proves his strength and resilience time and time again. This is who I walk for.