Marine Lt. Gen. John F. Kelly
Essentially he's saying BE A MAN! ENLIST!
"This is a decades-long war that will ebb and flow. We will succeed only so long as we don't run out of the kind of men like the ones Sunday night that are willing to go into the darkest and most dangerous places on Earth and hunt down and kill those who would do us harm."
As for the young people celebrating the news in front of the White House and Times Square, Kelly says they were "carrying on like fools" and "might consider making a real difference and joining the Marines or Army and lending a hand."