Jorge Recinos, a student a school for special needs children next door to the Lion's Club, is carrying Petrona Lopez, 80, a woman who had difficulty walking. She was first carried into the clinic by her daughter -- but Recinos, eager to help, quickly volunteered to carry her between the waiting room, screening room and operating room over the course of several hours.

Long after Paul, his team and the American surgeons and volunteers head home, folks like Recimos and Lopez will still be living in Salama. This image is a reminder that despite the personal, professional or political intentions of anyone participating on the medical mission this week, everyone had the same goal: Restore or improve eyesight. They succeeded. And they provided help and hope in a terriblyit a color video resolution of 510 by 492 pixels. While the first Black Widow prototype was a flat disk with a single vertical stabilizer and a propeller in the front, it was followed by an improved Black Widow that looked a little like a thin portable CD player with tapered edges and cut-off corners; a propeller in front; and three fins on the back. It did not have autonomous navigation capabilities, and was controlled essentially like a hobbyist's RC airplane.

Subsystems design
Along with the flight prototypes, the DARPA effort considered subsystems design. A useful operational MAV would need a lightweight, highly efficient engine with a power source with high energy density. Electric motors were becoming available that met the requirement, but power sources were more troublesome. Lithium batteries