A photo of four Michigan teens standing at attention for the national anthem is going viral.

Mike Ullery Jr. was walking into a high school football game in Midland, Michigan, on Friday when the pregame rendition of "The Star-Spangled Banner" began to play.

He noticed four Bullock Creek High School students who were also heading to the game stop in their tracks, remove their hats and place their hands over their hearts to salute the anthem and flag.

Ullery was struck by the boys' act of patriotism, so he snapped a photo and posted it on Facebook, and it quickly spread.

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Photo credit: Mike Ullery Jr.

"I was impressed by these Bullock Creek boys. Running late to the game they heard the national anthem and stopped, took off their hats and placed hands over heart," Ullery wrote on Facebook. "Respect."

CBS News reported that several Bullock Creek parents commented on the Facebook post and helped identify Dakota Lehner, Mikiah Lehner, Taylor Cox and Collin Hitchingham as the four boys in the photo.

"I was just proud of them," Ullery told CBS. "So I just snapped a picture and hoped it would get back to them when I posted it on Facebook."

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