Here's another great example of the power of pictures -- and how the internet provides a valuable forum that traditional mass media could not have for distributing and making those pictures even more effective.
This photo study, titled "The Places We Live," captures images of slums in four cities around the world -- in Venezuela, India, Indonesia, and Kenya -- in an interactive slide-show format, and set against quotes from residents and even with background "street sounds."
Once you've picked a city, you can then "enter" an individual's house, "walk" around their house, and listen to the householder talk about their life.
There is also a photo book based on the project, and a gallery exhibition touring the world.
The Places We Live.