Pediatrician Dr. Mona Hanna-Attisha’s research helped expose lead in Flint, Michigan’s water supply — now, she’s talking with Senior Correspondent Brenda Flanagan about why “Newark is what keeps [her] up at night.”

Hanna-Attisha answers questions regarding Newark’s response to the public emergency, the difference between the Newark and Flint water crises and the threat elevated lead levels pose to children.