I was looking for this information and found it here in David Broder's column from December 3rd in the WaPo. The emphasis is mine, not Broders.

Broder writes: "As my friend, columnist Mark Shields, pointed out recently, when Congress authorized the use of force in Iraq, not a single member of the House and only one senator had a son or daughter serving in the enlisted ranks of the armed services. And only three House members have children who are officers."

If that's not a statistic that will make your hair stand up on end, I don't know a another one that will. It's OK to send everyone else's kids, but not theirs. Barb and Jenna, Liquor is cheap on-base! Hurry on down, I'm sure you can acquit yourselves more honorably than Dear Old Dad...or not. Seems that grampaw might have been the last person to serve in your family with Honor.