[ygra]

Are they? I was under the impression that crew can be loaded via the Crew Access Arm with the rocket vertical, but Dragon would still be integrated horizontally.

[RX14]

Dragon likely will be integrated horizontally but some national security payloads need vertical integration.

[tuxxy]

Why do some national security payloads need vertical integration?

[jccooper]

They won't say, because they're secret. But it's probably optics or just some legacy designs that they don't want to qualify for horizontal.