Witnessing true heroism in action highlights the void between those who step up and risk their own life to advance humanity and those who act it out on screen. On Aug. 24, I had the privilege of attending the Discovery space shuttle launch at the Kennedy Space Center, one of the last manned space missions until 2015, when the Orion spacecraft takes flight. As I watched on the giant plasma monitors set up at the press site, the seven astronauts prepared for the launch, their faces a picture of excitement and anticipation--like children on Christmas morning.

As they departed for the shuttle, I could only imagine what was going through their mindsÑthe many years of training and sacrifice leading up to this very moment. It became clear to me that I was in the presence of heroes. The feeling was both palpable and overwhelming.

Astronauts aren't looking for fame and fortune. Their driving force is much deeper than becoming a celebrity. They're the ones whom children of all ages should look up to. Playing a game for a living would be fun, but making the world a better place has a lasting impact.

That's what makes true heroes so special. The work carried out by teachers, doctors, police officers, firefighters, emergency-response personnel and astronauts has staying power. Their daily efforts have an effect on future generations. From the first colonists to our Founding Fathers to our country's war veterans and soldiers, we owe a debt of gratitude to them for the liberties and quality of life we take for granted today.

They're ordinary people doing extraordinary things, and fortunately, America has a long tradition of producing these brave men and women. Their selflessness, sacrifice and service have contributed to the welfare and betterment of society, shaping America into the great country it is.

We will never be able to thank these men and women enough. But we honor them for their selfless contributions and recognize them as heroes for all mankind.