How Cooper Flagg’s family tragedy — and triumph — made one particular charity effort personal

DURHAM, N.C. — Try as she might, the tears still prove unrelenting for Kelly Flagg. “I said I wasn’t going to cry today, so I won’t be the one to tell it, and still I get choked up,” she said before pausing to compose herself. Speaking to families, young patients, employees and volunteers at Durham’s Ronald McDonald House on Dec. 12, the Flagg family shared the backstory for why they donated …