And when you talk about retiring after 17 years and three more, an enormous difference if you retire after 20 years.

NPR: Marine Recall Prompts Questions over Iraq Stress

And young people especially understand this, because I think -- it's interesting, when I talk to Malia and Sasha -- you guys are so much more aware than I was of conserving our natural resources and thinking about the planet.

WHITEHOUSE: President Obama at the University of Miami