Both of Tom Harper's grandfathers served in the military and one of them later made a career out of repairing military helicopters in Florida. After seeing that world up close, Harper knew he wanted to join the military - although his future would be in ground forces. He finished basic training right before the 9/11 attacks and was ready and willing to be part of the fight that followed.

In this edition of "Veterans Chronicles," Harper takes us inside his first moments of combat in Afghanistan and then walks us through the December 2009 action there, where he and his men were wounded in a mortar assault. Only he and one other soldier were able to keep fighting and trying to hold off the enemy while waiting for air support. He also describes the events that led to his second Purple Heart, as his convoy in Afghanistan was struck by an IED in a kill zone.

Finally, Col. Harper, who is still on active duty, talks about his current duties trying to keep the military and members of Congress on the same page on the best policies for our military and national security.