I asked, "" Where were you on 9 / 11? "" And one young Ranger in the back — his hair's tousled and his face is red and windblown from being in combat in the cold Afghan wind — he said, "" Sir, I was in the sixth grade. "" And it reminded me that we're operating a force that must have shared purpose and shared consciousness, and yet he has different experiences, in many cases a different vocabulary, a completely different skill set in terms of digital media than I do and many of the other senior leaders.