Armed man at Walmart says he was testing right to bear arms

In this undated booking photo provided by the Greene County, Missouri, Sheriff's Office shows 20-year-old Dmitriy Andreychenko. Five days after 22 people were killed at a Walmart store in El Paso, Texas, panicked shoppers fled a Walmart in Springfield, Missouri, after Andreychenko, carrying a rifle and wearing body armor walked around the store before being stopped by an off-duty firefighter. Police on Friday identified the man as Andreychenko, who lived in the Springfield area. (Greene County Sheriff via AP) .

SPRINGFIELD, Mo. — Prosecutors on Friday filed a terrorist threat charge against a 20-year-old man who said he walked into a Missouri store wearing body armor and carrying a loaded rifle and handgun to test whether Walmart would honor his constitutional right to bear arms.