"Everybody always assumes that when we talk reviews, it means reduction. Not necessarily," Esper said.
The Pensacola gunman obtained a handgun through a federal loophole that allows foreign nationals to own a gun if they have a hunting license.
"Here's the bottom line: This was a mistake," Milley said.
Army Secretary Mark Esper said on Friday that some schools "are not letting our recruiters in" to talk to students, and some school counselors "are not even presenting [the Army] as an opportunity, the chance to serve their country."