Want to learn chess? How to play samba music on the drums? Some smooth Latin dance moves? Ideally, you go to the experts -- people who have been doing these things for years and years.

Charles Taylor, a 74-year-old life-long gardener, composter, and advocate of cooking and grilling fresh foods, lost his gardening land when he relocated from his house to an apartment. So, in the summer of 2009 he found himself clambering out of a window onto the second story rooftop of the Hammond Street Senior Center in search of a space to grow the fresh vegetables he loved.

The sunny Bangor, Maine senior center roof started out as a spot for a few tomato plants and leafy greens. Now it is growing into a model to inspire healthy eating, gardening for exercise, and a place for seniors to dream big. 

Meet GameChangers competition judge Tanni Grey-Thompson, Britain's greatest ever paralympic athlete and one of the most gifted and courageous sportswomen of her generation. In this video, Grey-Thompson—who broke 35 world records as a wheelchair athlete—says being born with spina bifida "didn't really play a big part in my life."

New leaders are emerging in the soccer world of Brazil and Argentina who use football as a catalyst for social change and development. They parallel the achievements of Brazil's Seleção and La Albiceleste of Argentina—two of the most decorated teams in football history that have been represented over the years by some of the most dynamic and celebrated players ever to have worn their countries' colors.

During the 2010 World Cup In South Africa, Brazil and Argentina hired Dunga and Diego Maradona, respectively, to manage their national teams. Despite their limited coaching experience, both managed to silence critics with successes on the pitch. Brazil entered the World Cup as the top ranked team and Argentina seemed to have found its form at just the right time.

Emilia, a 25-year-old blind woman from a poor neighborhood of on the outskirts of Buenos Aires, Argentina, no longer has to depend on her family for money. "Working allows me to be independent," she said. "I don’t need to borrow money from other people if I want to buy something or go out with friends."