Pentagon spokesperson Sean Parnell told Axios the directive is the result of a process that kicked off this summer "to thoroughly vet all external engagements to ensure the department does not lend its name and credibility to organizations, forums and events that run counter to the values of this administration." It comes as the Pentagon also rolls out rules that require reporters to sign a pledge not to gather information that hasn't been officially authorized for release, or risk losing their credentials.
After navigating a half-hour queue to get through security, a group of us were told we needed to go back outside, walk 10 minutes and then go through security again to reach the media centre. Which would have been fine except the staff at the new entrance had been given instructions not to admit the media, and told us to go back to where we had started and queue for security a third time.