A sandy-haired and boyishly attractive performer from a disadvantaged and politically active background, Mark Webber went from so-called "shelter boy" to movie star with an acting career on the ascent since his 1997 debut in the Philadelphia-based gritty youth feature "Edge City". The son of a struggling single mother, Webber had a relatively normal childhood in his Minneapolis home until age ten when a perceived welfare fraud ended benefits, landed his mother in jail and left the two homeless. In 1990, mother and son relocated to Philadelphia, where they became noted activists for homeless