Medic who treated patients with fentanyl discusses his recovery from opioid addiction

In Part 4 of a series, Bob Woodruff learns how the drug used to treat his near fatal injury in Iraq nearly killed the same man who saved his life.

ABC News correspondent Bob Woodruff and his cameraman Doug Vogt were covering the Iraq War in 2006 and embedded with U.S. and Iraqi forces when an explosion nearly killed them.

Woodruff and Vogt were severely injured and rushed to the hospital in Baghdad, the place where Woodruff met the medic who he says helped save their lives, Sgt. Dave Williamson, including by giving them pharmaceutical-grade fentanyl to manage their pain.

Once in the trauma bay, Williamson and his surgical team were able to treat Vogt and Woodruff.

“We knew that [Woodruff and Vogt] were in, in serious, serious, serious dire straits … we just needed to get a tube in your throat and have you breathing off machines,” Williamson said.