On this day, July 18, in 1984, James Oliver Huberty walked into a San Diego-area McDonald's and started shooting indiscriminately, killing 21 people and wounding 19 before being shot dead by police.

Huberty was a survivalist who hoarded food, kept loaded weapons in every room of his house and was obsessed with the end of the world.

Three weeks after losing his job as a security guard, he took his family to the San Diego Zoo, then told his wife he was "hunting humans." Earlier that day he told her that "society had its chance."

At 4 p.m., he walked into the San Ysidro restaurant on the Mexican border and began picking off customers.

Huberty had fired 257 rounds before he was fatally shot by a SWAT team sniper.