WSB-TV in Atlanta has this story from Durham, North Carolina:

Blaine Tolison spoke with Stephen McMenamin, a former U.S. Marine, whose wife took the photos and posted them to Facebook.

He said a veteran on the ground was using his bag of medication for a pillow after being denied an available reclining chair.

“The nurse started yelling at him, telling him he can’t do that. He’s like, ‘I can’t get up and I won’t get up. I will be here until you can see me. Can I please have a blanket?’” McMenamin said.

Here’s video of a news report on the photo: