In this photo taken on Monday, April 26, 2010, Palestinian students Nour Al-Arda, right, Asil Shaar, center, and Asil Abu Lil walk with a prototype of a beeping walking stick for blind people that they built in Askar Girls’ School, run by UNRWA, in Askar refugee camp in the West Bank city of Nablus. Shaar, Al-Arda and Abu Lil built the beeping walking stick for a class project at their United Nations-funded girls’ school with parts scrounged from around the West Bank. They won a trip to San Jose, California, for an international youth science fair. (AP Photo/Grant Slater)