On tonight's Late Show, Brian Williams stopped by to chat with David Letterman about his holiday vacation. What did we learn? Williams' junk was felt up—multiple times!—by the TSA. Also: Williams never ceases to be hilarious. Watch inside.

[There was a video here]

Of course, this isn't the first time that Williams has spoken (bragged?) publicly about his penis—remember this?

[Late Show with David Letterman]