How many “workplace” incidents involve IEDs, body armor and Go-Pro cameras?

Via Guardian:

President Barack Obama is giving a statement from the Oval Office, pledging to reporters in a closed session that investigators will find out what motivated the attack.

“At this stage we do not yet know why this terrible event occurred. We do know that the two individuals who were killed were equipped with weapons and appeared to have access to additional weaponry at their homes.

But we don’t know why they did it. We don’t know at this point the extent of their plans we don not know their motivations. And I just received a briefing from FBI director Comey as well as AG Lynch indicating the course of their investigation.

It is possible that this was terrorist related but we don’t know. It’s also possible that this was workplace related. and until the FBI’s been able to conduct what will be a large number of interviews, until we understand what the workplace relationship between the individuals and his superiors, because he worked with the organization where this terrible shooting took place, until all the social media and electronic information has been [sorted].