Some questions for anyone who knows.... do these come with an AC adaptor, or should I add one to my order if I buy from NewEgg?

Also, am I correct in assuming these don't have DVD drives? None of the reviews or specs mention one, so I'm assuming you move data on and off them using a USB cable.

And, finally, since I'm a laptop newbie and hope to get this thing in time to take with me on a vacation next week, when approaching airport screening, are you supposed to open your laptop and power it on so they can see it is what it is?