A veteran is looking for change from a New Jersey theme park after he said he was kicked out because of his military T-shirt.

According to NJ.com, Mario Alejandro is a 33-year-old veteran who served four years in the Marine infantry, part of the initial invasion into Iraq in 2003. He said he is now classified as disabled because of hearing loss and post-traumatic stress disorder.

Alejandro said he and his family went to Six Flags Great Adventure in New Jersey over the weekend. He was wearing a T-shirt from the Reconnaissance Foundation, an organization that helps support Recon Marines and their families. The shirt reads: "Keep Calm and Return Fire," along with a picture of a machine gun.

He said when he was walking through the gate, a security guard stopped him and told him his shirt was offensive, and he needed to change it. Alejandro said he told the guard it was a military shirt and pointed out the logo on the back.  But he said the guard told him he needed to buy another shirt or put one on over it.

After Alejandro refused, he said the guard went to talk to a supervisor before coming back and kicking him out of the park.  Alejandro said he's upset because he doesn't feel any veteran or military member should be treated that way.

A Six Flags representative told NJ.com that their policy prohibits any clothing with vulgar, offensive or violent language or images. She said policy is to ask the guest to remove the clothing and replace it or buy another item at a shop there and wear it.

She said the incident is under review, and added that Six Flags has a longstanding positive relationship with the military.