And I remember about three years ago, I was visiting a friend in New York and I started walking in the streets around our school.

NPR: Memoir Offers an Inside Look at Autism

In K-Kids, we walk around our school and pick up the trash.

WHITEHOUSE: Anyone Can Do It

In fact at ten-to-nine in term time around 20% of traffic on our town centre or city roads is actually on the school run and this causes enormous problems - not only in congestion but also in terms of safety around the school gates.

BBC: Six forum: Road congestion

While we have each participated in our own way in building an advocacy movement around Darfur, it has been the high-school and college students who have made Darfur a political issue too important to be ignored, and who are now preparing similar campaigns for Congo.

WSJ: Obama's Opportunity to Help Africa