“DON’T TURN AWAY, PLEASE HELP!” A 90-YEAR-OLD WOMAN FELL NEAR THE CHECKOUT COUNTER, STRETCHING OUT HER HAND FOR HELP. SHOPPERS WALKED PAST AS IF SHE WERE INVISIBLE—UNTIL A MAN IN BLACK STOPPED, KNELT BESIDE HER, AND CHANGED EVERYTHING. The automatic doors sighed open and a ninety-year-old woman stepped into the supermarket, gripping a weathered cane like a lifeline. Each step cost her effort. Her back protested. Her knees trembled. But the list in her pocket—bread, butter, tea, soup—felt non-neg