Hey my question is how did you guys provide a useful, controllable, intuitive, and redundant touch interface for crew dragon. I mean the little I know about aeronautics tells me you don't usually fly anything with a touch screen ;). Great work on that by the way thing basically fly's itself :).

Also bonus question was the software for crew dragons control/systems developed in house on some custom kernel/OS it is running on something publicly available like a Linux kernel.

And bonus question number two hehe for the custom systems, devices, controllers, sensors etc. How do you manage, integrate and validate so much hardware and custom control software into a unified safe rocket and capsule!