The annual shooting festival has been occurring at this farm for 30 years.
From the article and news video: (bolding has been added)
"We shoot everything from BB guns up to full-scale military, fully automatic 50-caliber machine guns," said Dan Vaughan, the organizer of the event.
The youngest shooter at Sunday’s festival was four years old, while the eldest was 86---a man who fought at Iwo Jima during World War II.
He doesn’t want people to get the wrong idea about those who shoot weapons for sport.
"This particular boy's been injured many times playing soccer, and that's what his father's comment was... this is a heck of a lot safer than soccer."