On National Missing Children’s Day, the Newark office of the FBI is pledging to continue its mission to finding them.

Mark Himebaugh was 11 years old when he disappeared from his Del Haven neighborhood on Nov. 25, 1991.

"He was doing just what 11-year-old boys do.  He was following some fire trucks to a brush fire in his neighborhood,” says FBI Special Agent in Charge Timothy Gallagher.

Officials have released age-progression photos of what Timothy could look like today in his mid-30. His mother still lives in the area.

The FBI says that modern times have given them more tools for finding missing children, like Amber Alerts and social media.

"Getting pictures out there.  The first couple hours after a child goes missing is absolutely critical, I can't stress that enough,” Gallagher says.

The agency also has the Child ID App, which is an app that parents have preloaded photographs and descriptions of their children.

"They can hit the button and send this information to law enforcement and get this information out quicker than you can dial 911,” Gallagher says.

The FBI can also do DNA and trace analysis on the scene where the child went missing.

"If we have a site where the abduction may have occurred, we can bring those assets to the site and hopefully recover some trace evidence which would help us track the missing child as soon as possible,” the agent says.

National Missing Children's Day was established in the 1980's by President Ronald Reagan after the Etan Patz case.

People less than 18 years old make up about 38 percent of the FBI’s missing persons file.