Fighting back against ageism

Theresa Harrison's approach to getting old never gets old. At 64, her energy is impressive, as are her skills: "I've become more innovative. I've become more creative. I've become more curious"

The Baltimore-based technology company she founded, Green Street Services, handles cybersecurity for the Department of Defense. And she started the company when she was in her 50s.

Speaking of startup entrepreneurs, correspondent Susan Spencer said, "The stereotype is of the hotshot 19-year-old in the garage, right?"