GMA 40: ABC News' Dan Childs attempts 40-hour, no-sleep marathon

As Good Morning America celebrates its 40th anniversary with 40 straight hours of programming, Dan Childs of ABC News' Medical Unit is staying awake for more than 40 hours.

Childs is also doing it for the Icahn School of Medicine to show what happens when the body doesn't get sleep.

He hopes to make it until 8 a.m. Thursday.