From the harmonies of randomness to the dynamics of the Earth's crust, Kahn uses scientific principles to create mesmerizing works of art.

NPR: Artist Captures Wonder of Natural Phenomena

Because there is no other nation on earth with the capacity that we have by virtue of our principles, our history, our beliefs, our values, our resources, and our freedom, that can lead.

CENTERFORSECURITYPOLICY: Liz Cheney at the Freedom Flame: Educating Obama

These four principles illustrate that the concept of sustainable development in the Earth Charter embraces the view that the problems of poverty, environmental degradation, ethnic and religious conflict, and social injustice are all interdependent, and that policies that address one problem can impact and improve other issues.

UNESCO: Understanding sustainable development