A nurse on what she's seeing in Gaza; what we know about the NYC shooter

The world's leading body on hunger said today that "the worst case scenario of famine" is unfolding in the Gaza Strip. Guest host Andrea Mitchell speaks with Elidalis Burgos, a volunteer nurse in Khan Younis, about what she's seeing on the ground. Also, Tom Winter, NBC News national law enforcement and intelligence correspondent, joins to share what we know about the suspect in the New York City shooting. And Dr. Vin Gupta, NBC News medical analyst, sheds light on CTE, the brain disease the shooting suspect mentioned in a note he left at the scene.